cmd: Enable BIND by default if we have USB_ETHER

The nature of the network stack means that if we are going to use the
gadget mode USB network driver there's no easy path to implicitly
bind/unbind the driver. Enable the "bind" command by default here so
that we can bind/unbind this as needed.

Signed-off-by: Tom Rini <trini@konsulko.com>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
diff --git a/cmd/Kconfig b/cmd/Kconfig
index 2d6e5f9..7f65e31 100644
--- a/cmd/Kconfig
+++ b/cmd/Kconfig
@@ -986,6 +986,7 @@
 config CMD_BIND
 	bool "bind/unbind - Bind or unbind a device to/from a driver"
 	depends on DM
+	default y if USB_ETHER
 	help
 	  Bind or unbind a device to/from a driver from the command line.
 	  This is useful in situations where a device may be handled by several