drm/radeon/kms: for downclocking non-mobility check PERFORMANCE state

AtomBIOS tables on non-mobility GPU do not contain POWERSAVE/BATTERY.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Reviewed-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

drivers/gpu/drm/radeon/radeon_pm.c

@@ -91,14 +91,24 @@ static struct radeon_power_state * radeon_pick_power_state(struct radeon_device
 	default:
 		return rdev->pm.default_power_state;
 	case POWER_STATE_TYPE_POWERSAVE:
+		if (rdev->flags & RADEON_IS_MOBILITY) {
 			wanted_types[0] = POWER_STATE_TYPE_POWERSAVE;
 			wanted_types[1] = POWER_STATE_TYPE_BATTERY;
 			wanted_count = 2;
+		} else {
+			wanted_types[0] = POWER_STATE_TYPE_PERFORMANCE;
+			wanted_count = 1;
+		}
 		break;
 	case POWER_STATE_TYPE_BATTERY:
+		if (rdev->flags & RADEON_IS_MOBILITY) {
 			wanted_types[0] = POWER_STATE_TYPE_BATTERY;
 			wanted_types[1] = POWER_STATE_TYPE_POWERSAVE;
 			wanted_count = 2;
+		} else {
+			wanted_types[0] = POWER_STATE_TYPE_PERFORMANCE;
+			wanted_count = 1;
+		}
 		break;
 	case POWER_STATE_TYPE_BALANCED:
 	case POWER_STATE_TYPE_PERFORMANCE: