msm: kgsl: Update pagetable on context destruction for A20x

Ensure that pagetable is updated during context destruction. This
resolves stability issues during Camera launch/exit scenarios. Applies
only to A20x GPUs. This change is already done for Z180 device.

Change-Id: I955c7220aa8234009f5bca0a273093e47147279d
Signed-off-by: Rammohan Basavaraju <rammoh@codeaurora.org>

drivers/gpu/msm/adreno_drawctxt.c

@@ -199,6 +199,9 @@ void adreno_drawctxt_destroy(struct kgsl_device *device,
 
 	adreno_idle(device, KGSL_TIMEOUT_DEFAULT);
 
+	if (adreno_is_a20x(adreno_dev))
+		kgsl_setstate(device, KGSL_MMUFLAGS_PTUPDATE);
+
 	kgsl_sharedmem_free(&drawctxt->gpustate);
 	kgsl_sharedmem_free(&drawctxt->context_gmem_shadow.gmemshadow);