Kyle Evans 85f58288a7 aw_ccung: Support clock factors where factor=0, factor is effectively 1
This happens in two cases for a20 clocks:

pll_core for 'n' factor:
factor=0, val=1
factor=n, val=n

ahb divisor:
factor=0,val=/2
factor=n,val=/2^n

Reviewed by:	manu
Differential Revision:	https://reviews.freebsd.org/D15806
2018-06-14 17:36:02 +00:00
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