bufhelp: enable fast unaligned memory accesses on powerpc
* cipher/bufhelp.h [__powerpc__] (BUFHELP_FAST_UNALIGNED_ACCESS): Set macro enabled. [__powerpc64__] (BUFHELP_FAST_UNALIGNED_ACCESS): Ditto.
PowerPC can handle unaligned memory accesses fast, so enable fast
buffer handling in bufhelp.h.
- Signed-off-by: Jussi Kivilinna <jussi.kivilinna@iki.fi>