msm: kgsl: Do not detect faults when GPU core is idle

Do not detect GPU faults when GPU hardware status is idle,
this leads to incorrect fault detection.

Conflicts:
	drivers/gpu/msm/adreno.h

Change-Id: I7a9f8c49eb819241698f99fd50aaed400aadd4f4
Signed-off-by: Tarun Karra <tkarra@codeaurora.org>
Signed-off-by: Hareesh Gundu <hareeshg@codeaurora.org>
(cherry picked from commit 8002a0061d3ccfeccb93af50bce4ef44977845af)