rt2800: warn if doing VCO recalibration for unknow RF chip

Since we reset TX_PIN_CFG register, we have to finish recalibration.
Warn if this is not possible.

Signed-off-by: Stanislaw Gruszka <sgruszka@redhat.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/ralink/rt2x00/rt2800lib.c

@@ -4346,6 +4346,8 @@ void rt2800_vco_calibration(struct rt2x00_dev *rt2x00dev)
 		rt2800_rfcsr_write(rt2x00dev, 3, rfcsr);
 		break;
 	default:
+		WARN_ONCE(1, "Not supported RF chipet %x for VCO recalibration",
+			  rt2x00dev->chip.rf);
 		return;
 	}