[PATCH] powerpc/powernv: Add opal-prd channel

[Stewart Smith]

Jeremy Kerr <jk at ozlabs.org> writes:

> This change adds a char device to access the "PRD" (processor runtime
> diagnostics) channel to OPAL firmware.
>
> Includes contributions from Vaidyanathan Srinivasan, Neelesh Gupta &
> Vishal Kulkarni.
>
> Signed-off-by: Neelesh Gupta <neelegup at linux.vnet.ibm.com>
> Signed-off-by: Jeremy Kerr <jk at ozlabs.org>

Acking that firmware interface is merged into skiboot and OPAL call
number is correct.

Acked-by: Stewart Smith <stewart at linux.vnet.ibm.com>