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/M5253EVBE_defconfig b/configs/M5253EVBE_defconfig
index 7383c65..754787c 100644
--- a/configs/M5253EVBE_defconfig
+++ b/configs/M5253EVBE_defconfig
@@ -8,9 +8,9 @@
 CONFIG_CMD_IMLS=y
 CONFIG_CMD_IDE=y
 # CONFIG_CMD_SETEXPR is not set
-# CONFIG_CMD_NET is not set
 CONFIG_CMD_CACHE=y
 CONFIG_CMD_EXT2=y
 CONFIG_CMD_FAT=y
 CONFIG_MAC_PARTITION=y
+# CONFIG_NET is not set
 CONFIG_MTD_NOR_FLASH=y