[Mellanox] Fix split configuration for Mellanox SN3800-D112C8 SKU SAI…

… profile for fast-reboot performance (#8897)

- Why I did it
Wrong SKU configuration will lead to longer init flow.
This will affect fast-reboot feature by increasing the traffic downtime.
Since MLNX met the required downtime period with this SKU this bug found with a delay.

- How I did it
Add the required split labels for ports.

- How to verify it
Run fast-reboot with this platform using SN3800-D112C8 SKU.

device/mellanox/x86_64-mlnx_msn3800-r0/Mellanox-SN3800-D112C8/sai_3800_112x50g_8x100g.xml

@@ -46,6 +46,7 @@
                 <width>4</width>
                 <module>51</module>
                 <breakout-modes>3</breakout-modes>
+                <split>2</split>
                 <port-speed>384</port-speed>
             </port-info>
             <port-info>
@@ -77,6 +78,7 @@
                 <width>4</width>
                 <module>55</module>
                 <breakout-modes>3</breakout-modes>
+                <split>2</split>
                 <port-speed>384</port-speed>
             </port-info>
             <port-info>
@@ -108,6 +110,7 @@
                 <width>4</width>
                 <module>59</module>
                 <breakout-modes>3</breakout-modes>
+                <split>2</split>
                 <port-speed>384</port-speed>
             </port-info>
             <port-info>
@@ -139,6 +142,7 @@
                 <width>4</width>
                 <module>63</module>
                 <breakout-modes>3</breakout-modes>
+                <split>2</split>
                 <port-speed>384</port-speed>
             </port-info>
             <port-info>
@@ -170,6 +174,7 @@
                 <width>4</width>
                 <module>15</module>
                 <breakout-modes>3</breakout-modes>
+                <split>2</split>
                 <port-speed>384</port-speed>
             </port-info>
             <port-info>
@@ -201,6 +206,7 @@
                 <width>4</width>
                 <module>11</module>
                 <breakout-modes>3</breakout-modes>
+                <split>2</split>
                 <port-speed>384</port-speed>
             </port-info>
             <port-info>
@@ -232,6 +238,7 @@
                 <width>4</width>
                 <module>7</module>
                 <breakout-modes>3</breakout-modes>
+                <split>2</split>
                 <port-speed>384</port-speed>
             </port-info>
             <port-info>
@@ -263,6 +270,7 @@
                 <width>4</width>
                 <module>3</module>
                 <breakout-modes>3</breakout-modes>
+                <split>2</split>
                 <port-speed>384</port-speed>
             </port-info>
             <port-info>
@@ -294,6 +302,7 @@
                 <width>4</width>
                 <module>47</module>
                 <breakout-modes>3</breakout-modes>
+                <split>2</split>
                 <port-speed>384</port-speed>
             </port-info>
             <port-info>
@@ -325,6 +334,7 @@
                 <width>4</width>
                 <module>43</module>
                 <breakout-modes>3</breakout-modes>
+                <split>2</split>
                 <port-speed>384</port-speed>
             </port-info>
             <port-info>
@@ -354,6 +364,7 @@
                 <width>4</width>
                 <module>39</module>
                 <breakout-modes>3</breakout-modes>
+                <split>2</split>
                 <port-speed>384</port-speed>
             </port-info>
             <port-info>
@@ -383,6 +394,7 @@
                 <width>4</width>
                 <module>35</module>
                 <breakout-modes>3</breakout-modes>
+                <split>2</split>
                 <port-speed>384</port-speed>
             </port-info>
             <port-info>
@@ -414,6 +426,7 @@
                 <width>4</width>
                 <module>19</module>
                 <breakout-modes>3</breakout-modes>
+                <split>2</split>
                 <port-speed>384</port-speed>
             </port-info>
             <port-info>
@@ -445,6 +458,7 @@
                 <width>4</width>
                 <module>23</module>
                 <breakout-modes>3</breakout-modes>
+                <split>2</split>
                 <port-speed>384</port-speed>
             </port-info>
             <port-info>
@@ -474,6 +488,7 @@
                 <width>4</width>
                 <module>27</module>
                 <breakout-modes>3</breakout-modes>
+                <split>2</split>
                 <port-speed>384</port-speed>
             </port-info>
             <port-info>
@@ -503,8 +518,9 @@
                 <width>4</width>
                 <module>31</module>
                 <breakout-modes>3</breakout-modes>
+                <split>2</split>
                 <port-speed>384</port-speed>
             </port-info>
         </ports-list>
     </platform_info>
-</root>
+</root>