dmaengine: tegra-apb: proper default init of channel slave_id
Initialize default channel slave_id(req_sel) to invalid id (i.e max supported slave id + 1) to avoid overwriting of slave_id during tegra_dma_slave_config() with client data if slave_id is not initialized through DT Signed-off-by: Shardar Shariff Md <smohammed@nvidia.com> Reviewed-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com>
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