Three-patch series targeting the BCM2712/RP1 (Raspberry Pi 5)
silent TX hang documented at:
* https://github.com/cilium/cilium/issues/43198
* https://bugs.launchpad.net/ubuntu/+source/linux-raspi/+bug/2133877
0001: flush PCIe posted write after TSTART doorbell
0002: re-check ISR after IER re-enable in macb_tx_poll
0003: add TX stall watchdog fallback for lost TCOMP
New patches live in patches/linux/ and are copied into
checkouts/pkgs/kernel/build/patches/ via a new 'patches-linux'
Makefile target, wired into the existing 'patches' aggregate.
Verified to apply cleanly against raspberrypi/linux @ f2f68e79f16f
(the ref pinned by the preceding commit).
Author of the patches: Lukasz Raczylo <lukasz@raczylo.com>.
