RISC-V Devicetrees for v6.9

Microchip:
Missing bus clocks for the CAN controllers spotted during the creation
of a driver for the controllers and a specific compatible for the SiFive
PDMA block on PolarFire SoC.

Starfive:
PWM nodes for the jh7100 and jh7110. Camera subsystem support for the
latter. Most notably however is the addition of ethernet support for the
jh7110 which finally allows people to use the network on the OG VisionFive
and on the Beagle-V Starlight board. This was made possible by the
non-standard cache management operations support added for the RZ/Five
which could be extended to the ccache present on the jh7100.

bindings:
Additional clarification for what the reg property represents for cpus
and two opencores PWM binding changes - the original addition and an
added compatible. The latter is here as the driver patch was not ready
but the PWM maintainer told me to go ahead and merge it.

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
-----BEGIN PGP SIGNATURE-----

iHUEABYIAB0WIQRh246EGq/8RLhDjO14tDGHoIJi0gUCZed3VgAKCRB4tDGHoIJi
0rfBAP9n6/i9bitGfqZHXKc1CpqwIWb8sw28OC4u6UWaNEzSmQEA0R0bagMcfVDi
szpu4+58Bk4hbd/6lOwacdskEUp0bwU=
=gBjh
-----END PGP SIGNATURE-----