Sean Cross 065e0412ec efm32hg: cmu: add USHFRCODIV2 clock definition
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>
2019-06-02 22:23:44 +00:00
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