kernel: bump 5.15 to 5.15.56
Manually rebased:
bcm27xx/patches-5.15/950-0470-sound-usb-add-device-quirks-for-A4Tech-FHD-1080p-web.patch
Remove upstreamed:
bcm27xx/patches-5.15/950-0060-tty-amba-pl011-Add-un-throttle-support.patch[1]
All other patches automatically rebased.
1. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v5.15.56&id=
2db3b95166f72e6481a79b82b1d6f94f4b18fcc1
Build system: x86_64
Build-tested: bcm2711/RPi4B, mt7622/RT3200
Run-tested: bcm2711/RPi4B, mt7622/RT3200
Signed-off-by: John Audia <therealgraysky@proton.me>