power: changed unsigned to unsigned int

power: changed unsigned to unsigned int

Since this patch-set attempts to clean up the power library,
and there are many instances of "unsigned" caught by checkpatch,
it was decided to clean these up first rather than have them included
in the later patches in the patch set. And would also minimise this
type of error being caught by checkpatch in the future

Signed-off-by: Marko Kovacevic <marko.kovacevic@intel.com>
Acked-by: David Hunt <david.hunt@intel.com>