drm/xe/display: Add check for alloc_ordered_workqueue()

Add check for the return value of alloc_ordered_workqueue()
in xe_display_create() to catch potential exception.

Fixes: 44e69495 ("drm/xe/display: Implement display support")
Cc: stable@vger.kernel.org
Signed-off-by: Haoxiang Li <haoxiang_li2024@163.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://lore.kernel.org/r/4ee1b0e5d1626ce1dde2e82af05c2edaed50c3aa.1747397638.git.jani.nikula@intel.com


Signed-off-by: Jani Nikula <jani.nikula@intel.com>
(cherry picked from commit 5b62d633)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>