ArmPkg/BdsLib: Replace ARM magic value by a proper defined value.

"ARMH" is the Four-Letter unique identifier used by ARM in the context
of the fast SMC identification interface.

This patch properly defines this value in a header file instead
of using the numeric value directly in the code.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Olivier Martin <olivier.martin@arm.com>



git-svn-id: https://edk2.svn.sourceforge.net/svnroot/edk2/trunk/edk2@14268 6f19259b-4bc3-4df7-8a09-765794883524

ArmPkg/Library/BdsLib/BdsLinuxFdt.c

@@ -260,8 +260,7 @@ PrepareFdt (
       if (Rx == ARM_TRUSTZONE_UID_4LETTERID) {
         Rx   = ARM_SMC_ID_UID + 1;
         ArmCallSmc (&Rx);
-        //TODO: Replace ARM magic number
-        if (Rx == 0x40524d48) {
+        if (Rx == ARM_TRUSTZONE_ARM_UID) {
           PsciSmcSupported = TRUE;
         }
       }