msm: kgsl: add power tracepoints

Add kgsl_clk, kgsl_bus, kgsl_irq, kgsl_rail, kgsl_pwrlevel,
kgsl_pwr_set_state and kgsl_pwr_request_state trace
events.

Change-Id: I3bf246f350b1208123ab9a33c08495cea9c533eb
Signed-off-by: Jeremy Gebben <jgebben@codeaurora.org>
diff --git a/drivers/gpu/msm/kgsl_device.h b/drivers/gpu/msm/kgsl_device.h
index b301743..f82b038 100644
--- a/drivers/gpu/msm/kgsl_device.h
+++ b/drivers/gpu/msm/kgsl_device.h
@@ -318,4 +318,6 @@
 		irqreturn_t (*dev_isr) (int, void*));
 void kgsl_device_platform_remove(struct kgsl_device *device);
 
+const char *kgsl_pwrstate_to_str(unsigned int state);
+
 #endif  /* __KGSL_DEVICE_H */