drm/radeon: comment out some currently unused eg dpm code

Keep it around for reference.
Signed-off-by: NAlex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/cypress_dpm.c

@@ -2005,11 +2005,13 @@ int cypress_dpm_set_power_state(struct radeon_device *rdev)
 	return 0;
 }
 
+#if 0
 void cypress_dpm_reset_asic(struct radeon_device *rdev)
 {
 	rv770_restrict_performance_levels_before_switch(rdev);
 	rv770_set_boot_state(rdev);
 }
+#endif
 
 void cypress_dpm_display_configuration_changed(struct radeon_device *rdev)
 {