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/efi-x86_defconfig b/configs/efi-x86_defconfig
index ed4faee..83850d4 100644
--- a/configs/efi-x86_defconfig
+++ b/configs/efi-x86_defconfig
@@ -33,5 +33,6 @@
 CONFIG_DEBUG_UART_BASE=0
 CONFIG_DEBUG_UART_CLOCK=0
 CONFIG_ICH_SPI=y
+# CONFIG_REGEX is not set
 CONFIG_EFI=y
 # CONFIG_EFI_LOADER is not set