serial: 8250_dw: add support for AMD SOC Carrizo

Add ACPI identifier for UART on AMD SOC Carrizo.

Signed-off-by: Ken Xue <Ken.Xue@amd.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
diff --git a/drivers/tty/serial/8250/8250_dw.c b/drivers/tty/serial/8250/8250_dw.c
index 5a5ecf3..d641886b 100644
--- a/drivers/tty/serial/8250/8250_dw.c
+++ b/drivers/tty/serial/8250/8250_dw.c
@@ -634,6 +634,7 @@
 	{ "80860F0A", 0 },
 	{ "8086228A", 0 },
 	{ "APMC0D08", 0},
+	{ "AMD0020", 0 },
 	{ },
 };
 MODULE_DEVICE_TABLE(acpi, dw8250_acpi_match);