pxa: move serial driver to drivers/serial

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/include/configs/wepep250.h b/include/configs/wepep250.h
index 197ac0b..9a20cce 100644
--- a/include/configs/wepep250.h
+++ b/include/configs/wepep250.h
@@ -33,6 +33,7 @@
 /*
  * Select serial console configuration
  */
+#define CONFIG_PXA_SERIAL
 #define CONFIG_BTUART          1       /* BTUART is default on WEP dev board */
 #define CONFIG_BAUDRATE   115200