freedreno: Some asan fixes
First one is a long-standing nir_lower_amul
asan fix. (Not sure if I remember why driver_location
is used for UBOs but location
for SSBOs, but that seems to be the way it is.)
Second one ended up not being needed in the end, but seems like a good idea.
Third one fixed the main issue that was taking down the a630-asan job