kernel: bump 6.12 to 6.12.45

kernel: bump 6.12 to 6.12.45

Changelog: https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.45

Removed upstreamed:
  generic/backport-6.12/626-v6.17-net-ipv4-fix-regression-in-local-broadcast-routes.patch[1]
  mediatek/patches-6.12/051-v6.17-thermal-drivers-mediatek-lvts_thermal-Change-lvts-co.patch[2]
  mediatek/patches-6.12/052-v6.17-thermal-drivers-mediatek-lvts_thermal-Add-lvts-comma.patch[3]
  mediatek/patches-6.12/053-v6.17-thermal-drivers-mediatek-lvts_thermal-Add-mt7988-lvt.patch[4]

All other patches automatically rebased.

1. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.12.45&id=81ff76c1b08827bc81779400a3640f102a9a9ade
2. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.12.45&id=d1f4b09d9bb991c0fe039511520c6e59f1b42ec1
3. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.12.45&id=739229eb4d5cd009d81ad8946fdd4bb5ec790c2e
4. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.12.45&id=9a7141d4808dcb833f87154af88560c785306cd2

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

Signed-off-by: John Audia <therealgraysky@proton.me>
Link: https://github.com/openwrt/openwrt/pull/19956
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>