drm/xe/mocs: Check if all domains awake

Check if all domains are awake specially for
LNCF regs

Fixes: 1182bc74 ("drm/xe: Fix MOCS debugfs LNCF readout")
Improvements-suggested-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Reviewed-by: Badal Nilawar <badal.nilawar@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20250506142300.1865783-1-tejas.upadhyay@intel.com


Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com>