drm/xe/device: fix XE_MAX_TILES_PER_DEVICE check

Here XE_MAX_TILES_PER_DEVICE is the gt array size, therefore the gt
index should always be less than.

v2 (Lucas):
  - Add fixes tag.

Fixes: dd08ebf ("drm/xe: Introduce a new DRM driver for Intel GPUs")
Signed-off-by: Matthew Auld <[email protected]>
Cc: Nirmoy Das <[email protected]>
Reviewed-by: Nirmoy Das <[email protected]>
Acked-by: Lucas De Marchi <[email protected]>
Reviewed-by: Rodrigo Vivi <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
(cherry picked from commit a96cd71)
Signed-off-by: Lucas De Marchi <[email protected]>

Author: matt-auld

drivers/gpu/drm/xe/xe_device.h

@@ -79,7 +79,7 @@ static inline struct xe_gt *xe_device_get_gt(struct xe_device *xe, u8 gt_id)
 	if (MEDIA_VER(xe) >= 13) {
 		gt = xe_tile_get_gt(root_tile, gt_id);
 	} else {
-		if (drm_WARN_ON(&xe->drm, gt_id > XE_MAX_TILES_PER_DEVICE))
+		if (drm_WARN_ON(&xe->drm, gt_id >= XE_MAX_TILES_PER_DEVICE))
 			gt_id = 0;
 
 		gt = xe->tiles[gt_id].primary_gt;