kernel: bump 6.12 to 6.12.31

kernel: bump 6.12 to 6.12.31

Changelog: https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.12.31

Remove upstreamed patches:
  backport-6.12/780-27-v6.15-r8169-don-t-scan-PHY-addresses-0.patch [1]
  backport-6.12/780-33-v6.15-r8169-disable-RTL8126-ZRX-DC-timeout.patch [2]
  bcm27xx/patches-6.12/950-0315-media-i2c-imx219-Correct-the-minimum-vblanking-value.patch [3]
  bcm27xx/patches-6.12/950-0857-drm-v3d-Add-clock-handling.patch [4]
  bcm27xx/patches-6.12/950-0874-PCI-brcmstb-Expand-inbound-window-size-up-to-64GB.patch [5]
  bcm27xx/patches-6.12/950-0877-PCI-brcmstb-Adding-a-softdep-to-MIP-MSI-X-driver.patch [6]
  bcm27xx/patches-6.12/950-0960-media-imx335-Set-vblank-immediately.patch [7]

Manually rebased patches:
  d1/patches-6.12/0009-ASoC-sunxi-sun4i-codec-add-basic-support-for-D1-audi.patch

[1] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.12.31&id=ba59747562c49974cbace989d76b94a8331da442
[2] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.12.31&id=2780aa8394415df0a69e3b908d6dd8c79e1d1bcc
[3] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.12.31&id=9a981079097bee6a0583877798de0b240717bdde
[4] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.12.31&id=bbd6dc1fb6c56267ad1d58810d92287fcd5b0058
[5] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.12.31&id=3ffaa2e999380477774e76680ff4cef247451168
[6] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.12.31&id=12153e3948c596737853c3ec4ff7e4e3f4a9f9a6
[7] https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.12.31&id=8d7e13c31c52690655883dff604238b0760a3644

Signed-off-by: Shiji Yang <yangshiji66@outlook.com>
Link: https://github.com/openwrt/openwrt/pull/18953
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>