ACPI: thinkpad-acpi: handle HKEY event 6030

HKEY event 0x6030 is a helper for Lenovo's Advanced Thermal Management
Windows driver, which is, of course, completely undocumented.

Silence any warnings about it being an unknown alarm, and report it
unmodified for userspace.

Signed-off-by: Henrique de Moraes Holschuh <[e-mail]>
Signed-off-by: Len Brown <[e-mail]>

drivers/platform/x86/thinkpad_acpi.c

···
 			"a sensor reports something is extremely hot!\n");
 		/* recommended action: immediate sleep/hibernate */
 		return true;
+	case 0x6030:
+		printk(TPACPI_INFO
+			"EC reports that Thermal Table has changed\n");
+		/* recommended action: do nothing, we don't have
+		 * Lenovo ATM information */
+		return true;
 	default:
 		printk(TPACPI_ALERT
 			 "THERMAL ALERT: unknown thermal alarm received\n");