PNP / ACPI: add ACPI_RESOURCE_TYPE_SERIAL_BUS as a valid type

An error message is printed for resources of type 19, which is a valid
supported resource type. The Firmware Test Suite tool (fwts) reports
this as a test failure. This change fixes the false test failures
for ASL that use type 19 (ACPI_RESOURCE_TYPE_SERIAL_BUS) resources.

Signed-off-by: Harb Abdulhamid <[e-mail]>
Signed-off-by: Timur Tabi <[e-mail]>
Signed-off-by: Rafael J. Wysocki <[e-mail]>

drivers/pnp/pnpacpi/rsparser.c

···
 	case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
 		break;
 
+	case ACPI_RESOURCE_TYPE_SERIAL_BUS:
+		/* serial bus connections (I2C/SPI/UART) are not pnp */
+		break;
+
 	default:
 		dev_warn(&dev->dev, "unknown resource type %d in _CRS\n",
 			 res->type);