ArmPkg/AsmMacroIoLib: force word alignment for functions

Without an explicit .align directive, the Clang assembler defaults to
no alignment, which may result in instructions appearing misaligned in
the final executable. So use word alignment in all cases.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>

ArmPkg/Include/AsmMacroIoLib.h

@@ -56,6 +56,7 @@
   .global   Name                  ; \
   .section  #Section, "ax"        ; \
   .type     Name, %function       ; \
+  .p2align  2                     ; \
   Name:
 
 #define ASM_FUNC(Name)            _ASM_FUNC(ASM_PFX(Name), .text. ## Name)