generic: mips: add pending patch to fix reboot

generic: mips: add pending patch to fix reboot

Add a pending hotfix to fix reboot functionality on MIPS platforms, at
least the Realtek target being affected.

The kernel bump from 6.18.33 to 6.18.34 introduced a backported commit
intending to fix a use-after-free issue [1]. As a side effect, it also
causes RCU to wait for CPUs which are already dead but RCU doesn't know
of.

[1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=linux-6.18.y&id=18c0456ea2615b1a743a6db739c74411c3b42bc6

Fixes: 94f3f9a845e8 ("kernel: bump 6.18 to 6.18.34")
Link: https://github.com/openwrt/openwrt/pull/23656
Signed-off-by: Jonas Jelonek <jelonek.jonas@gmail.com>