Enchilada / Fajita: Update kernel and firmware repos

Update to Linux 5.8 and bring some nice improvements:

• Use geni for touch i2c instead of CPU driven bitbang, this gives noticeable performance gains in phosh when scrolling and in general navigation.
• Enable bluetooth (using firmware in updated firmware package), was able to test bluetooth audio with bluetoothctl but phosh UI shows no Bluetooth adapter.
• Add testing battery node using bq27541, battery always reported being plugged in and at 100%.
• Add brightness support to both display panel drivers.
• Fix UFS error spam due to a bug where writeboost is enabled for all qcom devices - even though it isn't supported.
• Add quirk to wifi device to fix host capability request rather than the dodgy driver edit that was used before.
• Validate RTC wakealarm, it works :D times must be set relative to the time in the RTC as it's not possible to actually update the time in the RTC.
• Minimise .config size to improve build times.

All vendor specific firmware has been moved to the postmarketos subdirectory.

Ok, finally got everything sorted, I have just pmbootstrap zap'd and built/flashed a rootfs and kernel, all boots and works as expected.

Just noticed an issue with the firmware Finally all tested and working fine.