drm/xe: Fix stolen size check to allow equal WOPCM size

On some platforms without dedicated stolen memory, the calculated
stolen size may be exactly equal to the WOPCM size. The current
assertion incorrectly requires it to be strictly greater, causing
a false failure. Relax the check to allow equality.

Fixes: 65369b8e2961 ("drm/xe: Change return type of detect_bar2_dgfx() from s64 to u64")
Closes: https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/6359
Cc: Matthew Auld <[e-mail]>
Cc: Rodrigo Vivi <[e-mail]>
Signed-off-by: Shuicheng Lin <[e-mail]>
Reviewed-by: Matthew Auld <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Rodrigo Vivi <[e-mail]>

drivers/gpu/drm/xe/xe_ttm_stolen_mgr.c

···
 
 	stolen_size = tile_size - mgr->stolen_base;
 
-	xe_assert(xe, stolen_size > wopcm_size);
+	xe_assert(xe, stolen_size >= wopcm_size);
 	stolen_size -= wopcm_size;
 
 	/* Verify usage fits in the actual resource available */