This clock is the USB High Frequency PLL that gets trimmed based
on clock recovery. It is the most accurate PLL on the system,
assuming it is connected via USB.
Add the definition of this clock in preparation for being able
to switch to it.
Signed-off-by: Sean Cross <sean@xobs.io>
Somewhat replaces some earlier work done by hg/lg, but much more
complete, so we kept it as is, because it's bringing in even more parts
after this.
Reviewed-by: Karl Palsson <karlp@tweak.net.au>
Applies to both, and clearly shows that cmu.h needs to be extracted as
common code.
Originally from: e31d312331
and checked in the HG/LG reference manuals.
