kernel: bump 6.12 to 6.12.50

kernel: bump 6.12 to 6.12.50

Changelog: https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.50

Dropped upstreamed:
	backport-6.12/787-v6.17-net-sfp-add-quirk-for-FLYPRO-copper-SFP-module.patch[1]

All patches automatically rebased.

1. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.12.50&id=d2be6c429d8cc952ff42fdf31b6a7cffb5e233b0

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/20280
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>