ArmPkg/ArmLib: Add ArmHasTrbe () helper function

Create a helper function to query whether ID_AA64MFR1_EL1 indicates
presence of the Trace Buffer Extension (TRBE). This feature is only
visible in AARCH64 state.

Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Leif Lindholm <quic_llindhol@quicinc.com>
Cc: Pierre Gondois <pierre.gondois@arm.com>
Signed-off-by: Sami Mujawar <sami.mujawar@arm.com>
Reviewed-by: Leif Lindholm <quic_llindhol@quicinc.com>
Reviewed-by: Pierre Gondois <pierre.gondois@arm.com>

ArmPkg/Library/ArmLib/AArch64/AArch64Lib.c

@@ -119,3 +119,18 @@ ArmHasVhe (
 {
   return ((ArmReadIdAA64Mmfr1 () & AARCH64_MMFR1_VH) != 0);
 }
+
+/**
+  Checks whether the CPU implements the Trace Buffer Extension.
+
+  @retval TRUE  FEAT_TRBE is implemented.
+  @retval FALSE FEAT_TRBE is not mplemented.
+**/
+BOOLEAN
+EFIAPI
+ArmHasTrbe (
+  VOID
+  )
+{
+  return ((ArmReadIdAA64Dfr0 () & AARCH64_DFR0_TRBE) != 0);
+}