drm/msm: Remove idle function hook

There isn't any generic code that uses ->idle so remove it.

Signed-off-by: Jordan Crouse <jcrouse@codeaurora.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>
diff --git a/drivers/gpu/drm/msm/adreno/a4xx_gpu.c b/drivers/gpu/drm/msm/adreno/a4xx_gpu.c
index dfe0ece..19abf22 100644
--- a/drivers/gpu/drm/msm/adreno/a4xx_gpu.c
+++ b/drivers/gpu/drm/msm/adreno/a4xx_gpu.c
@@ -31,6 +31,7 @@
 
 extern bool hang_debug;
 static void a4xx_dump(struct msm_gpu *gpu);
+static bool a4xx_idle(struct msm_gpu *gpu);
 
 /*
  * a4xx_enable_hwcg() - Program the clock control registers
@@ -137,7 +138,7 @@ static bool a4xx_me_init(struct msm_gpu *gpu)
 	OUT_RING(ring, 0x00000000);
 
 	gpu->funcs->flush(gpu);
-	return gpu->funcs->idle(gpu);
+	return a4xx_idle(gpu);
 }
 
 static int a4xx_hw_init(struct msm_gpu *gpu)
@@ -534,7 +535,6 @@ static const struct adreno_gpu_funcs funcs = {
 		.last_fence = adreno_last_fence,
 		.submit = adreno_submit,
 		.flush = adreno_flush,
-		.idle = a4xx_idle,
 		.irq = a4xx_irq,
 		.destroy = a4xx_destroy,
 #ifdef CONFIG_DEBUG_FS