ArmPkg/ArmV7Lib: take MP extensions into account when programming TTBR

ArmPkg/ArmV7Lib: take MP extensions into account when programming TTBR

Bits 0 and 6 of the TTBRx system registers have different meanings
depending on whether a system implements the Multiprocessing
Extensions. So use separate memory attribute definitions for MP and
non-MP.

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@18899 6f19259b-4bc3-4df7-8a09-765794883524