GPU: Bump high freq to 533Mhtz

Change-Id: Id69b363a7781f90bfbdcf7b51a6c7537cbdb26a3
Makefile: add some optimization flags for ARM

Signed-off-by: faux123 <reioux@gmail.com>

Conflicts:

	Makefile

Change-Id: I38f5814d9569850ae0be3190d9542df8463d0cfa