MIPS: Alchemy: UARTs are of type 16550A

UART autodetection breaks on the Au1300 but the IP blocks are identical,
at least according to the datasheets.  Help the 8250 driver by passing
on uart type information via platform data.
Signed-off-by: NManuel Lauss <manuel.lauss@gmail.com>
Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/alchemy/common/platform.c

@@ -26,7 +26,9 @@
 		.irq		= _irq,				\
 		.regshift	= 2,				\
 		.iotype		= UPIO_AU,			\
-		.flags		= UPF_SKIP_TEST | UPF_IOREMAP	\
+		.flags		= UPF_SKIP_TEST | UPF_IOREMAP |	\
+				  UPF_FIXED_TYPE,		\
+		.type		= PORT_16550A,			\
 	}
 
 static struct plat_serial8250_port au1x00_uart_data[] = {