ArmPkg/ArmLib: Clean ArmV7Lib

- Move the non specific ArmV7 functions to ArmLib.
- Clean the ARM Platform common components to not depend on ArmV7 if not required



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@12453 6f19259b-4bc3-4df7-8a09-765794883524

ArmPkg/Drivers/CpuDxe/Mmu.c

@@ -15,8 +15,6 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 --*/
 
 #include "CpuDxe.h"
-//FIXME: Remove this ARMv7 specific header
-#include <Chipset/ArmV7.h>
 
 // First Level Descriptors
 typedef UINT32    ARM_FIRST_LEVEL_DESCRIPTOR;