kernel: usb: improve support for ath79 target
1. Remove outdated symbol CONFIG_USB_OHCI_ATH79.
The ath79 OHCI USB was already supported by the generic driver
kmod-usb-ohci. And this kernel symbol has been dropped since
upstream commit:
53d473fc1e38 ("usb: host: Remove the deprecated ATH79 USB host config options")
2. Add ath79 USB phy package to the OHCI dependencies.
Both EHCI and OHCI require it on the ath79 target.
Signed-off-by: Shiji Yang <yangshiji66@qq.com>
Link: https://github.com/openwrt/openwrt/pull/16380
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>