drm/xe/eustall: Add EU stall sampling support for Xe2

drm/xe/eustall: Add EU stall sampling support for Xe2

Add EU stall sampling support for Xe2 architecture GPUs - LNL and BMG.
EU stall data format for LNL and BMG is different from that of PVC.

v10: Update comments as per review feedback

v9: Use GRAPHICS_VER() check instead of platform

v8: Renamed struct drm_xe_eu_stall_data_xe2 to struct xe_eu_stall_data_xe2
    since it is a local structure.

Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Harish Chegondi <harish.chegondi@intel.com>
Signed-off-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/d85093e9ab1204d14d2cc783f304a4bc8688951c.1740533885.git.harish.chegondi@intel.com