drm/nouveau/pm/nv40: rename pcounter domains to 'pc' instead of 'pm'

This trivial patch makes thing more consistent since hardware signals
names are prefixed by 'pcXX'.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
1 file changed