msm: kgsl: Fix compilation failure for 32-bit platform

Changes to fix compilation failures for implicit
declaration of readq and writeq_relaxed for 32 bit
platform, warning for unused result and undefined
symbol for __aeabi_uldivmod.

Change-Id: I1382d3faae6e67945d37509046e60e9061bac871
Signed-off-by: Amit Kushwaha <kushwaha@codeaurora.org>