kernel: bump 6.6 to 6.6.91

kernel: bump 6.6 to 6.6.91

Changelog: https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.91

Removed upstreamed:
	generic/pending-6.6/730-net-ethernet-mtk_eth_soc-reset-all-TX-queues-on-DMA-.patch[1]

All other patches automatically rebased.

1. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.91&id=68f29bb97a0e0519156664cdc23e8b1f129e3254

Build system: x86/64
Build-tested: flogic/xiaomi_redmi-router-ax6000-ubootmod, ramips/tplink_archer-a6-v3
Run-tested: flogic/xiaomi_redmi-router-ax6000-ubootmod, ramips/tplink_archer-a6-v3

Signed-off-by: John Audia <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/18835
Signed-off-by: Hauke Mehrtens <[email protected]>
(cherry picked from commit ecac1d8abd0398935aff30a42deb5ac29c696afd)
Link: https://github.com/openwrt/openwrt/pull/18924
Signed-off-by: Robert Marko <[email protected]>