staging: unisys: remove MEMCPY functions from commontypes.h

This patch removes MEMCPY, MEMCPY_FROMIO, and MEMCPY_TOIO from commontypes.h,
and switches all use of these macros to the appropriate built in definition.

Signed-off-by: Benjamin Romer <benjamin.romer@unisys.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>