[marvell-armhf][uboot] Fixed the uboot setting for sonic-installer se…

…t-default form 202012 to 202205 branch. (#13911)

#### Why I did it
When using ```sonic-install set-default``` to switch the image from 202012 to 202205.  The system will be stuck at loading kernel while reboot.

#### How I did it
The issue is caused by the kernal size related setting in uboot environment is smaller in the 202012 branch while they are larger in 202205 branch.  The "sonic-installer set-default" just changes the boot_next variable.  To fix this issue, we sync up the 202012 branch kernel related setting with the 202205 branch.  This PR is only applicable to 202012 branch.

#### How to verify it
1) Install the latest 202205 image .89 or latest and reboot
2) Install the 202012 image which contains this fix and reboot
3) using "sonic-installer set-default 202205 image and reboot
4) system should start without any issue. 
  
#### Ensure to add label/tag for the feature raised. example - PR#2174 under sonic-utilities repo. where, Generic Config and Update feature has been labelled as GCU.

platform/marvell-armhf/platform.conf

@@ -6,9 +6,9 @@ echo "Preparing for installation ... "
 
 # global defines
 kernel_addr=0x1100000
-fdt_addr=0x1000000
-fdt_high=0x10fffff
-initrd_addr=0x2000000
+fdt_addr=0x2800000
+fdt_high=0x28fffff
+initrd_addr=0x2900000
 
 kernel_fname="/boot/vmlinuz-4.19.0-12-2-armmp"
 initrd_fname="/boot/initrd.img-4.19.0-12-2-armmp"
@@ -175,7 +175,7 @@ prepare_boot_menu() {
         BOOT3='echo " > Boot3: ONIE - run onie_nand_boot";echo;'
     fi
     BORDER='echo "---------------------------------------------------";echo;'
-    fw_setenv ${FW_ARG} print_menu $BORDER $BOOT1 $BOOT2 $BOOT3 $BORDER > /dev/null
+    fw_setenv ${FW_ARG} print_menu "$BORDER $BOOT1 $BOOT2 $BOOT3 $BORDER" > /dev/null
 
     fw_setenv ${FW_ARG} linuxargs "net.ifnames=0 loopfstype=squashfs loop=$image_dir/$FILESYSTEM_SQUASHFS systemd.unified_cgroup_hierarchy=0 varlog_size=$VAR_LOG_SIZE loglevel=4" > /dev/null
     fw_setenv ${FW_ARG} linuxargs_old "net.ifnames=0 loopfstype=squashfs loop=$image_dir_old/$FILESYSTEM_SQUASHFS systemd.unified_cgroup_hierarchy=0 varlog_size=$VAR_LOG_SIZE loglevel=4" > /dev/null