drm/i915: Dump pfit PGM_RATIOS as hex

pgm_ratios in stored as a register value in pipe config, so let's dump
this one as hex as well.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458052809-23426-15-git-send-email-ville.syrjala@linux.intel.com


Reviewed-by: Jani Nikula <jani.nikula@intel.com>