ArmPkg: copy/paste fixes in ARM ArmHvcLib/ArmSmcLib

ARM ArmHvcLib looks like it was created from copy of ArmSmcLib which
looks like it was created from a copy of the AArch64 version.

Both of these files include AsmMacroIoLibV8.h instead of
AsmMacroIoLib.h, although since they only use macros that are identical
between the two, there was no functional issue caused by this.

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