dma-fence: Fix safe access wrapper to call timeline name method

dma-fence: Fix safe access wrapper to call timeline name method

This commit fixes the wrapper function dma_fence_timeline_name(), that
was added for safe access, to actually call the timeline name method of
dma_fence_ops.

Cc: <stable@vger.kernel.org> # v6.17+
Signed-off-by: Akash Goel <akash.goel@arm.com>
Fixes: 506aa8b02a8d ("dma-fence: Add safe access helpers and document the rules")
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@igalia.com>
Signed-off-by: Tvrtko Ursulin <tursulin@ursulin.net>
Link: https://lore.kernel.org/r/20251021160951.1415603-1-akash.goel@arm.com