kernel: bump 6.6 to 6.6.86

kernel: bump 6.6 to 6.6.86

Changelog: https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.86

Removed upstreamed:
        generic/pending-6.6/155-usbnet-restore-usb%d-name-exception-for-local-mac-addresses.patch[1]

1. https://web.git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.86&id=2beb999f73b48f3cb04d7cb9c4b5400d59f80f89

Signed-off-by: Mieczyslaw Nalewaj <namiltd@yahoo.com>
Link: https://github.com/openwrt/openwrt/pull/18443
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>