This fixes the following sparse warnings:
drivers/dma/mediatek/mtk-hsdma.c:604:26: warning: Using plain integer
as NULL pointer
Signed-off-by: NHaowen Bai <baihaowen@meizu.com>
Link: https://lore.kernel.org/r/1649750340-30777-1-git-send-email-baihaowen@meizu.comSigned-off-by: NVinod Koul <vkoul@kernel.org>