drm/xe/slpc: Remove unnecessary force wakes

FORCEWAKE_ALL is not needed when we are trying to read the cur_freq,
we just need to wake up the GT domain. We also do not need a force wake
to for a H2G query to obtain min frequency.

Cc: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Vinay Belgaumkar <vinay.belgaumkar@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Reviewed-by: Himal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20241216194119.3017792-1-vinay.belgaumkar@intel.com


Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>