pwm: Changes for v6.9-rc1

This contains the usual amount of driver and device tree changes.
Additionally there is a big rework of how pwm lowlevel drivers are
registered to prepare adding character device support.

Thanks to Dharma Balasubiramani, Dong Aisheng, Duje Mihanović, Jerome
Brunet, Raag Jadav and Rafał Miłecki for their contributions. And sorry
for those who still need some patience because I didn't manage to empty
my review queue.
-----BEGIN PGP SIGNATURE-----

iQEzBAABCgAdFiEEP4GsaTp6HlmJrf7Tj4D7WH0S/k4FAmXuyf4ACgkQj4D7WH0S
/k4Yugf+P7gMPuCQJqWLvOyuHjKt4tI3aVsr+jbSiAfbPWaXAQKZunnZ9K17bOI2
JQkDuAi76teNRiVtNEx1ZEdfKe9KgY/Npq8BTmvXxvBktCand8sfhyyRaXYo9FWI
B5qKdp1WIg7ZDMoGQtLRayly4FAsbB0L50SjWmkVIXC2xXp6t6KxxgnOgTM58Oo9
0yYYetF3EOmDQ4J234/muaLbM+1rjajKdw+SgS2mry2WV60SOqo+PQfuK42XjWip
cLDkEgYogwx1MAbFgobtquA7Hvkdb2WyCirTDNZiGIBtmM89kH4Oa8e4IDR6FRqn
w35hJv7sxVjiqBrSMD/lWpJeQ8gPYg==
=6Ixv
-----END PGP SIGNATURE-----