dmaengine: ste_dma40: do not remove descriptors for cyclic transfers

Fix dma_tc_handle() to call d40_desc_remove() and d40_desc_done() only
for non-cyclic transfers, as this was breaking ux500_pcm since
introduced in:

d49278e3 dmaengine: dma40: Add support to split up large elements

Reported-by: Shreshtha Kumar Sahu <shreshthakumar.sahu@stericsson.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Fabio Baltieri <fabio.baltieri@linaro.org>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>