dmaengine: dw-edma: Drop chancnt initialization

The DMA engine core manages dma_device.chancnt itself, e.g., in
dma_async_device_register().  DMA device drivers should not initialize
chancnt because it causes the wrong number of channels printed in the
device summary.

Drop the dw-edma chancnt initialization.

Link: https://lore.kernel.org/r/20230113171409.30470-10-Sergey.Semin@baikalelectronics.ru


Fixes: e63d79d1 ("dmaengine: Add Synopsys eDMA IP core driver")
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>