kernel: bump 6.12 to 6.12.62

kernel: bump 6.12 to 6.12.62

Changelog: https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.62

Manually rebased:
  bcm27xx/patches-6.12/950-0358-mmc-sdhci-of-dwcmshc-define-sdio-timeout-clocks.patch

Removed upstreamed:
  backport-6.12/830-v6.18-spi-bcm63xx-fix-premature-CS-deassertion-on-RX-only-transactions.patch[1]

All other patches automatically rebased.

1. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.12.62&id=e31194bf494f6900a5f96f55ed194a00e458f8d1

Build system: x86/64
Build-tested: flogic/glinet_gl-mt6000, ramips/tplink_archer-a6-v3, x86/64-glibc
Run-tested: flogic/glinet_gl-mt6000, ramips/tplink_archer-a6-v3, x86/64-glibc

Signed-off-by: John Audia <[email protected]>
Link: https://github.com/openwrt/openwrt/pull/21126
Signed-off-by: Hauke Mehrtens <[email protected]>