msm: kgsl: Configure UCHE GMEM base address based on GMEM size

Different GPU can have a different GMEM size so need to configure
UCHE GMEM base address accordingly. Having a fix base as 0x100000
results in RB and UCHE GMEM range overlap on GPUs with GMEM size >1MB.
Also, adjust SVM 32bit base based on GMEM UCHE range end to prevent
GMEM UCHE and SVM 32bit range overlap.

Change-Id: I41330a33b79bf8c79b593ecd89593a796230b074
Signed-off-by: Deepak Kumar <dkumar@codeaurora.org>