platform/x86: thinkpad_acpi: cleanup for Thinkpad ACPI led

Make error returns more consistent... no behaviour change intended.
Signed-off-by: NPavel Machek <pavel@ucw.cz>
Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com>

drivers/platform/x86/thinkpad_acpi.c

@@ -5876,7 +5876,7 @@ static int led_set_status(const unsigned int led,
 			return -EPERM;
 		if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
 				(1 << led), led_sled_arg1[ledstatus]))
-			rc = -EIO;
+			return -EIO;
 		break;
 	case TPACPI_LED_OLD:
 		/* 600e/x, 770e, 770x, A21e, A2xm/p, T20-22, X20 */
@@ -5900,10 +5900,10 @@ static int led_set_status(const unsigned int led,
 			return -EPERM;
 		if (!acpi_evalf(led_handle, NULL, NULL, "vdd",
 				led, led_led_arg1[ledstatus]))
-			rc = -EIO;
+			return -EIO;
 		break;
 	default:
-		rc = -ENXIO;
+		return -ENXIO;
 	}
 
 	if (!rc)