sunxi-common.h: Don't undefine CONFIG_CMD_NFS

I see no reason to override the choice to include this from
config_cmd_defauls.h .

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Ian Campbell <ijc@hellion.org.uk>
diff --git a/include/configs/sunxi-common.h b/include/configs/sunxi-common.h
index 9d4801a..cbe8b40 100644
--- a/include/configs/sunxi-common.h
+++ b/include/configs/sunxi-common.h
@@ -168,7 +168,6 @@
 
 #undef CONFIG_CMD_FPGA
 #undef CONFIG_CMD_NET
-#undef CONFIG_CMD_NFS
 
 /* I2C */
 #define CONFIG_SPL_I2C_SUPPORT