drm/radeon/kms: add trivial debugging for voltage

agd5f: rebased

Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>
diff --git a/drivers/gpu/drm/radeon/rv770.c b/drivers/gpu/drm/radeon/rv770.c
index e8fb8b6..cec536c 100644
--- a/drivers/gpu/drm/radeon/rv770.c
+++ b/drivers/gpu/drm/radeon/rv770.c
@@ -53,6 +53,7 @@
 		if (voltage->voltage != rdev->pm.current_vddc) {
 			radeon_atom_set_voltage(rdev, voltage->voltage);
 			rdev->pm.current_vddc = voltage->voltage;
+			DRM_DEBUG("Setting: v: %d\n", voltage->voltage);
 		}
 	}
 }