xilinx-ppc4xx-generic: Use common u-boot.lds

Use common ppc4xx linker script for xilinx ppc440 and ppc405 related boards.

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/include/configs/xilinx-ppc.h b/include/configs/xilinx-ppc.h
index 2422c0b..bd7bac0 100644
--- a/include/configs/xilinx-ppc.h
+++ b/include/configs/xilinx-ppc.h
@@ -50,6 +50,7 @@
 #undef CONFIG_CMD_DHCP
 #undef CONFIG_CMD_EEPROM
 #undef CONFIG_CMD_IMLS
+#undef CONFIG_CMD_NFS
 
 /*Misc*/
 #define CONFIG_BOOTDELAY		5/* autoboot after 5 seconds     */