drm/nouveau/devinit: move simple pll setting routines to devinit

These are pretty much useless for reclocking purposes.  Lets make it
clearer what they're for and move them to DEVINIT to signify they're
for the very simple PLL setting requirements of running the init
tables.

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
24 files changed