gpu: msm2: Sync to upstream

* Sync with changes done in Google MSM kernel

Change-Id: I38b3d4b41a986dc16097b838afc770e372ddfc7d
diff --git a/drivers/gpu/msm2/kgsl_pwrctrl.h b/drivers/gpu/msm2/kgsl_pwrctrl.h
index 71a0fdd..9f18160 100644
--- a/drivers/gpu/msm2/kgsl_pwrctrl.h
+++ b/drivers/gpu/msm2/kgsl_pwrctrl.h
@@ -120,8 +120,8 @@
 void kgsl_pwrctrl_set_state(struct kgsl_device *device, unsigned int state);
 void kgsl_pwrctrl_request_state(struct kgsl_device *device, unsigned int state);
 
-int kgsl_active_count_get(struct kgsl_device *device);
-int kgsl_active_count_get_light(struct kgsl_device *device);
+int __must_check kgsl_active_count_get(struct kgsl_device *device);
+int __must_check kgsl_active_count_get_light(struct kgsl_device *device);
 void kgsl_active_count_put(struct kgsl_device *device);
 int kgsl_active_count_wait(struct kgsl_device *device, int count);