bcm27xx: bcm2711: add kmod-r8169

bcm27xx: bcm2711: add kmod-r8169

Some carrier boards [1][2] for the Raspberry Pi CM4 that are specifically
designed to be used as routers come with secondary NICs using a Realtek
RTL8111 Gigabit Ethernet chip.

When using such a board as a router with OpenWrt, it is very helpful
when both NICs are working by default. Since the Raspberry Pi 4 and the
CM4 have plenty of disk space, it should cause no harm to include the
kmod-r8169.

[1] https://wiki.dfrobot.com/Compute_Module_4_IoT_Router_Board_Mini_SKU_DFR0767
[2] https://www.waveshare.com/wiki/CM4-DUAL-ETH-MINI

Signed-off-by: Johannes Heimansberg <[email protected]>
(r8169 should pull in the necessary dependencies.)
Signed-off-by: Christian Lamparter <[email protected]>