drm/xe: Add kernel-doc to some xe_lrc interfaces

Add kernel-doc to xe_lrc_create/destroy and xe_lrc_get/put
interfaces.

v2: Fix kernel-doc for xe_lrc_create(), drop Fixes tag.
    (Matt Brost, Michal Wajdeczko)

Signed-off-by: Niranjana Vishwanathapura <niranjana.vishwanathapura@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240531161230.32317-1-niranjana.vishwanathapura@intel.com


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