Integrate linux-seco-imx/seco_lf-5.10.y-c43-rtc

Commit: https://git.seco.com/edgehog/bsp/nxp/linux-seco-imx/-/commit/b2730773458e793f5845a36b925e3b354685f8ef

[C43] let external RTC be system default

Assign SoC RTC to rtc1, so board RTC PCF2123 can be assigned to system default rtc0.

--

Commit: https://git.seco.com/edgehog/bsp/nxp/linux-seco-imx/-/commit/ae6f42432277ce00c623b41b305726eeb8fe636b

[C43] dts: clear reference board peripherals

--

Commit: https://git.seco.com/edgehog/bsp/nxp/linux-seco-imx/-/commit/dbf76905b2c1e1135cf80791188706543a02e7e8

[C43] add PCIe M.2 Key {E,B} W_DISABLE# support

--

Commit: https://git.seco.com/edgehog/bsp/nxp/linux-seco-imx/-/commit/5d6ea35312ec7c97c0900e4a1073ee3c2cb86309

[DEFCONFIG] add userspace regulator consumer support

--

Commit: https://git.seco.com/edgehog/bsp/nxp/linux-seco-imx/-/commit/ff612742c60d4c8306e8580326ff8a650b56ec22

[C43] nonfunctional: move elements out of regulators section