drm/msm: reset devfreq freq_table/max_state before devfreq_add_device

These never get set back to 0 when probing fails, so an attempt to probe
again results in broken behavior. Fix the problem by setting thse to zero
before they are used.
Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Signed-off-by: Rob Clark <robdclark@chromium.org>

drivers/gpu/drm/msm/msm_gpu.c

@@ -93,7 +93,11 @@ static void msm_devfreq_init(struct msm_gpu *gpu)
 	/*
 	 * Don't set the freq_table or max_state and let devfreq build the table
 	 * from OPP
+	 * After a deferred probe, these may have be left to non-zero values,
+	 * so set them back to zero before creating the devfreq device
 	 */
+	msm_devfreq_profile.freq_table = NULL;
+	msm_devfreq_profile.max_state = 0;
 
 	gpu->devfreq.devfreq = devm_devfreq_add_device(&gpu->pdev->dev,
 			&msm_devfreq_profile, DEVFREQ_GOV_SIMPLE_ONDEMAND,