lh7a40x: move serial driver to drivers/serial

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
diff --git a/include/configs/lpd7a400.h b/include/configs/lpd7a400.h
index b1bd74f..bf4a57d 100644
--- a/include/configs/lpd7a400.h
+++ b/include/configs/lpd7a400.h
@@ -43,6 +43,7 @@
 /*
  * select serial console configuration
  */
+#define CONFIG_LH7A40X_SERIAL
 #define CONFIG_CONSOLE_UART2	/* UART2 LH7A40x for console */
 
 /* allow to overwrite serial and ethaddr */