msm: kgsl: disable irq when adreno device is stopped

When restoring to slumber from nap, the irq is kept enabled causing a
power drain. This change ensures that adreno device behaves similar to
z180 device.

Change-Id: I7dd9b8f21ae341c978204b6dbb0162d606168b77
CRs-Fixed: 331847
Signed-off-by: Ranjhith Kalisamy <ranjhith@codeaurora.org>
diff --git a/drivers/gpu/msm/adreno.c b/drivers/gpu/msm/adreno.c
index b44dccc..805e2b6 100644
--- a/drivers/gpu/msm/adreno.c
+++ b/drivers/gpu/msm/adreno.c
@@ -565,6 +565,7 @@
 	kgsl_mmu_stop(device);
 
 	device->ftbl->irqctrl(device, 0);
+	kgsl_pwrctrl_irq(device, KGSL_PWRFLAGS_OFF);
 
 	/* Power down the device */
 	kgsl_pwrctrl_disable(device);