dmaengine: dw-edma: Don't permit non-inc interleaved xfers

The DW eDMA controller always increments both source and destination
addresses. Permitting DMA interleaved transfers with no src_inc/dst_inc
flags set may lead to unexpected behaviour for the device users.

Terminate interleaved transfers if at least one of the
dma_interleaved_template.{src_inc,dst_inc} flag is initialized to "false".

Note that in addition, we need to increase the source and destination
addresses after each iteration.

Link: https://lore.kernel.org/r/20230113171409.30470-6-Sergey.Semin@baikalelectronics.ru


Fixes: 85e7518f ("dmaengine: dw-edma: Add device_prep_interleave_dma() support")
Tested-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Acked-by: Vinod Koul <vkoul@kernel.org>