dmaengine: stm32-dma: mark pending descriptor complete in terminate_all

To prevent accidental repeated completion, mark pending descriptor
complete in terminate_all. It can be the case when terminate_all is called
while no end of transfer interrupt occurs.

Signed-off-by: Amelie Delaunay <amelie.delaunay@foss.st.com>
Link: https://lore.kernel.org/r/20211011094259.315023-2-amelie.delaunay@foss.st.com


Signed-off-by: Vinod Koul <vkoul@kernel.org>