kernel: bump 6.6 to 6.6.76

kernel: bump 6.6 to 6.6.76

Changelog: https://cdn.kernel.org/pub/linux/kernel/v6.x/ChangeLog-6.6.76

Manually rebased:
	bcm27xx/patches-6.6/950-0519-usb-dwc3-Set-DMA-and-coherent-masks-early.patch
	imx/patches-6.6/600-PCI-imx6-Start-link-at-max-gen-first-for-IMX8MM-and-IMX8MP.patch

Removed upstreamed:
	bcm27xx/patches-6.6/950-1446-media-i2c-ov9282-Correct-the-exposure-offset.patch[1]
	bcm47xx/patches-6.6/701-bgmac-reduce-max-frame-size-to-support-just-MTU-1500.patch[2]
	bcm53xx/patches-6.6/700-bgmac-reduce-max-frame-size-to-support-just-MTU-1500.patch[3]
	ramips/patches-6.6/003-v6.14-clk-ralink-mtmips-remove-duplicated-xtal-clock-for-Ralink.patch[4]

All other patches automatically rebased.

1. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.76&id=11c7649c9ec3dcaf0a7760551ad30747d9e02d81
2, 3. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.76&id=5e6e723675e54ced5200bcc367e2526badc4070c
4. https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?h=v6.6.76&id=d0edcd0d18d700d76c61c091a24568b8b8c3b387

Build system: x86/64
Build-tested: bcm27xx/bcm2712, flogic/xiaomi_redmi-router-ax6000-ubootmod, ramips/tplink_archer-a6-v3
Run-tested: bcm27xx/bcm2712, flogic/xiaomi_redmi-router-ax6000-ubootmod, ramips/tplink_archer-a6-v3

Signed-off-by: John Audia <therealgraysky@proton.me>
Link: https://github.com/openwrt/openwrt/pull/17822
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>