armv8: ls1043a: enable pxe commands

Enable pxe command for ls1043ardb and ls1043aqds.

Signed-off-by: Wenbin Song <wenbin.song@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>

include/configs/ls1043a_common.h

@@ -175,6 +175,8 @@
 
 /* Command line configuration */
 #define CONFIG_CMD_ENV
+#define CONFIG_MENU
+#define CONFIG_CMD_PXE
 
 /*  MMC  */
 #define CONFIG_MMC