drm/xe: Combine common force-wake code into helpers

The code of 'control' and 'wait' force-wake operations are very
similar for both 'wake' and 'sleep' cases. Add helpers to maximize
code reuse.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240611163537.1944-5-michal.wajdeczko@intel.com