[PATCH net-next] wan/fsl_ucc_hdlc: use dma_zalloc_coherent instead of allocator/memset

[David Miller]

From: YueHaibing <yuehaibing at huawei.com>
Date: Mon, 4 Jun 2018 21:07:59 +0800

> Use dma_zalloc_coherent instead of dma_alloc_coherent
> followed by memset 0.
> 
> Signed-off-by: YueHaibing <yuehaibing at huawei.com>

Applied.