drm/xe: Fix kerneldoc for xe_gt_tlb_inval_init_early

Correct the function name in the kerneldoc.
It is for below warning:
"Warning: drivers/gpu/drm/xe/xe_tlb_inval.c:136 expecting prototype for
xe_gt_tlb_inval_init(). Prototype was for xe_gt_tlb_inval_init_early()
instead"

v2: add () for the function. (Michal)

Fixes: db16f9d90c1d9 ("drm/xe: Split TLB invalidation code in frontend and backend")
Reviewed-by: Michal Wajdeczko <[e-mail]>
Signed-off-by: Shuicheng Lin <[e-mail]>
Signed-off-by: Michal Wajdeczko <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
(cherry picked from commit 0651dbb9d6a72e99569576fbec4681fd8160d161)
Signed-off-by: Thomas Hellström <[e-mail]>

drivers/gpu/drm/xe/xe_tlb_inval.c

···
 }
 
 /**
- * xe_gt_tlb_inval_init - Initialize TLB invalidation state
+ * xe_gt_tlb_inval_init_early() - Initialize TLB invalidation state
  * @gt: GT structure
  *
  * Initialize TLB invalidation state, purely software initialization, should