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

[Rahul Navale]

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

Hi Folker,

> Posting this as RFC because I can't verify this actually fixes the
> regression as I don't have a ZynqMP. So Rahul, could you test if this
> fixes the issue and report back?

I tested this patch on my ZynqMP platform.

Unfortunately, the issue still persists. Cyclic playback
fails after the first buffer period.

Regards,
Rahul Navale