The current null-pointer check in __dma_alloc_coherent and
__dma_free_coherent is not needed anymore since the
__dma_alloc/__dma_free functions won't be called if !dev (dummy ops will
be called instead).
Reviewed-by: NCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: NOlav Haugan <ohaugan@codeaurora.org>
Signed-off-by: NWill Deacon <will.deacon@arm.com>