common: Enable serial for PXA250

Signed-off-by: Marek Vasut <marek.vasut@gmail.com>
diff --git a/common/serial.c b/common/serial.c
index 7bebc12..c3323ea 100644
--- a/common/serial.c
+++ b/common/serial.c
@@ -30,7 +30,7 @@
 static struct serial_device *serial_devices = NULL;
 static struct serial_device *serial_current = NULL;
 
-#if !defined(CONFIG_LWMON) && !defined(CONFIG_PXA27X)
+#if !defined(CONFIG_LWMON) && !defined(CONFIG_PXA250) && !defined(CONFIG_PXA27X)
 struct serial_device *__default_serial_console (void)
 {
 #if defined(CONFIG_8xx_CONS_SMC1) || defined(CONFIG_8xx_CONS_SMC2)