drm/xe/guc: fix struct guc_lfd_file_header kernel-doc

drm/xe/guc: fix struct guc_lfd_file_header kernel-doc

Fix kernel-doc warnings on struct guc_lfd_file_header:

Warning: ../drivers/gpu/drm/xe/abi/guc_lfd_abi.h:168 expecting prototype
  for struct guc_logfile_header. Prototype was for struct
  guc_lfd_file_header instead

Fixes: 7eeb0e5408bd ("drm/xe/guc: Add LFD related abi definitions")
Cc: Zhanjun Dong <zhanjun.dong@intel.com>
Cc: Julia Filipchuk <julia.filipchuk@intel.com>
Cc: Ashutosh Dixit <ashutosh.dixit@intel.com>
Reviewed-by: Zhanjun Dong <zhanjun.dong@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patch.msgid.link/20260107155401.2379127-1-jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>