powernv/npu-dma.c: Fix opal_npu_destroy_context call

[Michael Ellerman]

On Fri, 2017-05-19 at 20:56:35 UTC, Alistair Popple wrote:
> opal_npu_destroy_context() should be called with the NPU PHB, not the
> PCIe PHB.
> 
> Signed-off-by: Alistair Popple <alistair at popple.id.au>

Applied to powerpc fixes, thanks.

https://git.kernel.org/powerpc/c/415ba3c157b9de7edc59468d19d48c

cheers