kernel: usb: fix dependencies for kmod-usb-roles package

kernel: usb: fix dependencies for kmod-usb-roles package

The usb role driver does not depend on the kernel config CONFIG_USB (host
side support). It only depends on the kernel config CONFIG_USB_SUPPORT.

Now it depends on the OpenWrt configurations USB_SUPPORT or
USB_GADGET_SUPPORT (usb and usbgadget features). We can assume that if usb
or usbgadget features are set, CONFIG_USB_SUPPORT has been set in the
target/subtarget kernel config.

Signed-off-by: Thomas Richard <thomas.richard@bootlin.com>
Link: https://github.com/openwrt/openwrt/pull/19246
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>