Add code to identify D0 stepping ValleyView SoC.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Shifei Lu <shifeix.a.lu@intel.com>
Reviewed-by: David Wei <david.wei@intel.com>




git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@17034 6f19259b-4bc3-4df7-8a09-765794883524

Vlv2TbltDevicePkg/Library/PchPlatformLib/PchPlatformLibrary.c

@@ -83,7 +83,12 @@ PchStepping (
       return PchB2;
       break;
 
-    case V_PCH_LPC_RID_A:
+    case V_PCH_LPC_RID_A:
+    case V_PCH_LPC_RID_B:
+      return PchB3;
+      break;
+
+    case V_PCH_LPC_RID_C:
     case V_PCH_LPC_RID_D:
       return PchC0;
       break;