memcpy_76(): add support for non-ARM architectures

Before, memcpy_76() assumed ARM instruction set.  Add preprocessor
guards to use generic memcpy() if not on ARM.

Change-Id: Id4d7335332f4086fa33641630f41810b2fe07031
Revert "memcpy_76(): add support for non-ARM architectures"

This reverts commit ad673c1cb9dd151fd4e74380c4ba82c1fefb580b.
FIX: memcpy_76(): add support for non-ARM architectures

Before, memcpy_76() assumed ARM instruction set.  Add preprocessor
guards to use generic memcpy() if not on ARM.

Original patch had args to memcpy_76 backwards.

Change-Id: Ib5375e9de28ab6c2b348731dcdf282d6f7a529c1
Merge remote-tracking branch 'origin/cm-10.1' into cm-10.1-linaro