kernel: bump 6.6 to 6.6.87

kernel: bump 6.6 to 6.6.87

Changelog: https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.87

Manually rebased:
	generic-hack/781-usb-net-rndis-support-asr.patch

All other patches automatically rebased.

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

Signed-off-by: John Audia <therealgraysky@proton.me>
Link: https://github.com/openwrt/openwrt/pull/18457
(cherry picked from commit 66b5ed7a4eb5e8f9bc9fb1584b7fd97b0a9978bd)
Link: https://github.com/openwrt/openwrt/pull/18730
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>