exynos5250: add uartmem_getbaseaddr() in uart driver

Change-Id: I76545ad3fca3cc0997050253be77ea83b5d74cb2
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/2423
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>

src/cpu/samsung/exynos5250/uart.c

@@ -201,6 +201,11 @@ static const struct console_driver exynos5_uart_console __console = {
 	.rx_byte  = exynos5_uart_rx_byte,
 //	.tst_byte = exynos5_uart_tst_byte,
 };
+
+uint32_t uartmem_getbaseaddr(void)
+{
+	return base_port;
+}
 #else
 void uart_init(void)
 {