[RFC PATCH] dmaengine: xilinx_dma: Fix per-channel direction reporting via device_caps

[Rahul Navale]

From: Rahul Navale <rahul.navale at ifm.com>

@Xilinx/AMD maintainers:

Quick status: the ASoC playback regression is still present.
when 7e01511443c3 ("dmaengine: xilinx_dma: Set dma_device directions")
is present. Reverting 7e01511443c3 restores normal playback.

Could you please advice the next steps / preferred fix direction to address
this regression upstream?

Thanks,
Rahul