Fix unknown type name 'u_int16_t' (#9158)

This patch fixes color-control-server when cross compiling with clang
for arm-linux-musleabi: "color-control-server.cpp:1535:5: error:
unknown type name 'u_int16_t'; did you mean 'uint16_t'?
     u_int16_t startHue = 0x2300;"

src/app/clusters/color-control-server/color-control-server.cpp

@@ -1532,7 +1532,7 @@ static void startColorLoop(EndpointId endpoint, uint8_t startFromStartHue)
     uint16_t currentHue = 0;
     Attributes::GetEnhancedCurrentHue(endpoint, &currentHue);
 
-    u_int16_t startHue = 0x2300;
+    uint16_t startHue = 0x2300;
     if (startFromStartHue)
     {
         Attributes::GetColorLoopStartEnhancedHue(endpoint, &startHue);