drivers: bluetooth: add support for RTL8852BE

[Joshua-Riek]

This PR fixes Bluetooth for the RTL8852BE, tested with the Orange Pi 5 Plus WiFi + Bluetooth module.

Cherry-picked from: orangepi-xunlong/linux-orangepi@7e6c316
Firmware PR: armbian/firmware#67

[amazingfate]

mainline's commit to support RTL8852B: torvalds/linux@18e8055
Is it possiable to use the firmware from mainline?

It has to overwrite mainline firmware file, need to reconsider.

[rpardini]

True. We've had similar during rtw88 migration on mainline, I think with 8822CS SDIO; the old driver matches with old firmware, while the mainline needs newer firmware.
In this case, a viable hack would be to rename prefix rtl_bt/rtl8852bu to rtl_bt/rtl8852bu_vendor (or some such) in both the kernel source and fw filenames?

[Joshua-Riek]

I will test out the mainline firmware tonight and see if it can work. If the vendor firmware is required, I think adding a vendor prefix will be a good alternative.

[Joshua-Riek]

I just confirmed we can use the firmware from mainline. So, this should be good to merge. I will close armbian/firmware#67.

Thanks!

[Joshua-Riek]

I think that I misunderstood. Should I send a PR to the firmware repo with the latest mainline RTL8852BE firmware?

[amazingfate]

No need to add mainline firmware to armbian/firmware, armbian-firmware-full will package the latest mainline firmware.