drm/xe: Write all slices if its mcr register

Register GAMREQSTRM_CTRL should be considered mcr register
which should write to all slices as per documentation.

Bspec: 71185
Fixes: 01570b44 ("drm/xe/bmg: implement Wa_16023588340")
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Tejas Upadhyay <tejas.upadhyay@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240814095614.909774-3-tejas.upadhyay@intel.com


Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>