msm: kgsl: Change gpuaddr to unsigned long everywhere

gpuaddr was changed to unsigned long in certain structs but not
everywhere. Also fix some print statements to regard gpuaddr as
type long.

Change-Id: I1aefa4f36ba7178e8146175205ce65e091e74c4a
Signed-off-by: Shrenuj Bansal <shrenujb@codeaurora.org>