thinkpad_acpi: Fix inconsistent mute LED after resume

The mute LED states have to be restored after resume.

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=70351
Cc: <stable@vger.kernel.org> [v3.13+]
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>

drivers/platform/x86/thinkpad_acpi.c

@@ -8447,9 +8447,21 @@ static void mute_led_exit(void)
 		tpacpi_led_set(i, false);
 }
 
+static void mute_led_resume(void)
+{
+	int i;
+
+	for (i = 0; i < TPACPI_LED_MAX; i++) {
+		struct tp_led_table *t = &led_tables[i];
+		if (t->state >= 0)
+			mute_led_on_off(t, t->state);
+	}
+}
+
 static struct ibm_struct mute_led_driver_data = {
 	.name = "mute_led",
 	.exit = mute_led_exit,
+	.resume = mute_led_resume,
 };
 
 /****************************************************************************