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/ms7720se_defconfig b/configs/ms7720se_defconfig
index 0a35891..7434a1f 100644
--- a/configs/ms7720se_defconfig
+++ b/configs/ms7720se_defconfig
@@ -24,12 +24,11 @@
 # 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_CACHE=y
 # CONFIG_CMD_MISC is not set
 CONFIG_CMD_EXT2=y
 CONFIG_DOS_PARTITION=y
+# CONFIG_NET is not set
 CONFIG_MTD_NOR_FLASH=y
 CONFIG_SCIF_CONSOLE=y
 CONFIG_USE_PRIVATE_LIBGCC=y