rockchip/rk3288: UART uses 32bit wide registers

Change-Id: I084eb4694a2aa8f66afc1f3148480608ac3ff02b
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: https://review.coreboot.org/13635
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/soc/rockchip/rk3288/uart.c

@@ -155,7 +155,7 @@ void uart_fill_lb(void *data)
 	serial.type = LB_SERIAL_TYPE_MEMORY_MAPPED;
 	serial.baseaddr = CONFIG_CONSOLE_SERIAL_UART_ADDRESS;
 	serial.baud = default_baudrate();
-	serial.regwidth = 1;
+	serial.regwidth = 4;
 	lb_add_serial(&serial, data);
 
 	lb_add_console(LB_TAG_CONSOLE_SERIAL8250MEM, data);