Backport support for the RTL8157. The RTL8157 is a low-cost chipset
designed for USB to 5Gb Ethernet adapters.
Tested on Sabrent NT-C5GA (RTL8157), Wavlink WL-NWU340G (RTL8157) and
UGREEN CM648 (RTL8156BG) adapters.
Signed-off-by: Aleksander Jan Bajkowski <olek2@wp.pl>
Link: https://github.com/openwrt/openwrt/pull/23088
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>