[PATCH] arc: remove num-slots from arc platforms

[Alexey Brodkin]

Hi Shawn,

On Wed, 2017-07-05 at 15:10 +0800, Shawn Lin wrote:
> dwmmc driver deprecated num-slots and plan to get rid
> of it finally. Just move a step to cleanup it from DT.

Hm, that's interesting.
In our upcoming devboard (HSDK, see
http://lists.infradead.org/pipermail/linux-snps-arc/2017-July/002667.html)
we do use 2 slots of DW MobileStorage controller (even though it's not yet
mentioned in its .dts).

So the question is if multi-slot support gets removed from dwmmc driver or
it's just a .dts option gets obsoleted. In latter case I'm wondering how to
enable a second slot in dwmmc driver (will it just auto-probe it etc)?

-Alexey