Kconfig: cmd: Make networking command dependent on NET

Enable networking command only when NET is enabled.
And remove selecting NET for CMD_NET

Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/warp_defconfig b/configs/warp_defconfig
index 5d1dfe4..bddf4bc 100644
--- a/configs/warp_defconfig
+++ b/configs/warp_defconfig
@@ -18,8 +18,6 @@
 CONFIG_CMD_USB=y
 CONFIG_CMD_USB_MASS_STORAGE=y
 # CONFIG_CMD_SETEXPR is not set
-# CONFIG_CMD_NET is not set
-# CONFIG_CMD_NFS is not set
 CONFIG_CMD_CACHE=y
 CONFIG_CMD_EXT2=y
 CONFIG_CMD_EXT4=y
@@ -27,6 +25,7 @@
 CONFIG_CMD_FAT=y
 CONFIG_CMD_FS_GENERIC=y
 CONFIG_ENV_IS_IN_MMC=y
+# CONFIG_NET is not set
 CONFIG_DFU_MMC=y
 CONFIG_USB=y
 CONFIG_USB_STORAGE=y