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/vct_platinumavc_small_defconfig b/configs/vct_platinumavc_small_defconfig
index 157597c..f3cab1c 100644
--- a/configs/vct_platinumavc_small_defconfig
+++ b/configs/vct_platinumavc_small_defconfig
@@ -17,10 +17,9 @@
 # CONFIG_CMD_ITEST is not set
 # CONFIG_CMD_SOURCE is not set
 # CONFIG_CMD_SETEXPR is not set
-# CONFIG_CMD_NET is not set
-# CONFIG_CMD_NFS is not set
 # CONFIG_CMD_MISC is not set
 # CONFIG_ISO_PARTITION is not set
 CONFIG_ENV_IS_IN_FLASH=y
+# CONFIG_NET is not set
 CONFIG_MTD_NOR_FLASH=y
 CONFIG_SYS_NS16550=y