drm/xe: Fix driver reference in FLR comment

Rectify the reference of i915 to Xe in a comment.

v2: Cosmetic changes. (Karthik)
v3: Rephrased the commit message. (Karthik)

Signed-off-by: Varun Gupta <varun.gupta@intel.com>
Reviewed-by: Karthik Poosa <karthik.poosa@intel.com>
Link: https://lore.kernel.org/r/20250911111712.811524-1-varun.gupta@intel.com


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