arch/powerpc: Use dma_zalloc_coherent

[Michael Ellerman]

On Mon, 2018-11-05 at 03:28:23 UTC, Sabyasachi Gupta wrote:
> Replaced dma_alloc_coherent + memset with dma_zalloc_coherent
> 
> Signed-off-by: Sabyasachi Gupta <sabyasachi.linux at gmail.com>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/c3d6a64bd1e82ea486bff46b17d540

cheers