msm: kgsl: Add A504 GPU support for SDM429

Add A504 GPUID and initial settings to support
graphics functionality on SDM429.

Change-Id: I3e967cea59cd8d5eb687ba5701a80689a24c0475
Signed-off-by: Hareesh Gundu <hareeshg@codeaurora.org>
Signed-off-by: Amit Kushwaha <kushwaha@codeaurora.org>
Signed-off-by: Archana Sriram <apsrir@codeaurora.org>