drm/xe/pf: Request 64K aligned allocations for LMTT PD

The LMTT Page Directory, as well as the directory entries, must be
aligned on a 64KB boundary in VRAM. Use explicit alignment flag to
match hardware requirement.

Bspec: 52404, 67468
Cc: Michał Winiarski <michal.winiarski@intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240313104132.1045-3-michal.wajdeczko@intel.comSigned-off-by: Michał Winiarski <michal.winiarski@intel.com>

drivers/gpu/drm/xe/xe_lmtt.c

@@ -71,7 +71,7 @@ static struct xe_lmtt_pt *lmtt_pt_alloc(struct xe_lmtt *lmtt, unsigned int level
 					     lmtt->ops->lmtt_pte_num(level)),
 				  ttm_bo_type_kernel,
 				  XE_BO_CREATE_VRAM_IF_DGFX(lmtt_to_tile(lmtt)) |
-				  XE_BO_CREATE_PINNED_BIT);
+				  XE_BO_NEEDS_64K | XE_BO_CREATE_PINNED_BIT);
 	if (IS_ERR(bo)) {
 		err = PTR_ERR(bo);
 		goto out_free_pt;