The CVB calculation and voltage setting functions can be reused for the
future chips. So move the declaration to gk20a.h.
Signed-off-by: NVince Hsu <vinceh@nvidia.com>
Signed-off-by: NAlexandre Courbot <acourbot@nvidia.com>
Signed-off-by: NBen Skeggs <bskeggs@redhat.com>