[DTC PATCH] remove check for interrupt-controller property under /chosen

[Jon Loeliger]

So, like, the other day Stuart Yoder mumbled:
> 
> Remove warning for missing interrupt-controller property
> under /chosen.  There is consensus that this
> property does not belong here.
> 
> Also, add a warning if interrupt-controller _is_ found
> under /chosen.
> 
> Signed-off-by: Stuart Yoder <stuart.yoder at freescale.com>

Applied.

Thanks,
jdl