Merge branch 'master' of https://source.denx.de/u-boot/custodians/u-boot-sh

Merge branch 'master' of https://source.denx.de/u-boot/custodians/u-boot-sh

This is R-Car X5H support. It was originally posted before rc1 and the
changes are well isolated. This is the final patchset which enables the
Gen5 drivers that are already in tree. I waited with this a bit until
the SCMI ID discussion stabilized and TFA X5H support landed. So now, I
can add the final piece into U-Boot too.

Note that this is still very much experimental, the X5H upstreaming is
in very early stages. The OF_UPSTREAM conversion will happen likely in
2026.04 or 2026.07 window, depending on when the Linux DTs land. The
compound-clock.c is surely going to go away once SCP gets updated and
the MFIS mailbox will be reworked once upstream bindings get developed.

This also includes SH DT alignment fix.