msi-wmi: Fix memory leak

Fix memory leak - don't forget to kfree ACPI object when returning from
msi_wmi_notify() after suppressing key event.
Signed-off-by: NMaxim Mikityanskiy <maxtram95@gmail.com>
Acked-by: NAnisse Astier <anisse@astier.eu>
Signed-off-by: NLee, Chun-Yi <jlee@suse.com>
Signed-off-by: NMatthew Garrett <matthew.garrett@nebula.com>

drivers/platform/x86/msi-wmi.c

@@ -176,7 +176,7 @@ static void msi_wmi_notify(u32 value, void *context)
 				pr_debug("Suppressed key event 0x%X - "
 					 "Last press was %lld us ago\n",
 					 key->code, ktime_to_us(diff));
-				return;
+				goto msi_wmi_notify_exit;
 			}
 			last_pressed[key->code - SCANCODE_BASE] = cur;
 
@@ -195,6 +195,8 @@ static void msi_wmi_notify(u32 value, void *context)
 			pr_info("Unknown key pressed - %x\n", eventcode);
 	} else
 		pr_info("Unknown event received\n");
+
+msi_wmi_notify_exit:
 	kfree(response.pointer);
 }