BUSmemcpy.c provides xf86BusToMem and xf86MemToBus, which are are memcpy
wrappers written to avoid glibc's memcpy on Alpha. glibc'c memcpy on
Alpha has improved much since this was written, so it's no longer
needed. Neither function is used inside the xserver, and no module on
my machine uses either as well.
Signed-off-by: Matt Turner <mattst88@gmail.com>