arm64: dma-mapping: fix aliasing issues with non-CMA alloc

Cache flush and clearing of logical mapping is done right now
only when the allocation is from CMA, for allocation requests
with DMA_ATTR_STRONGLY_ORDERED or DMA_ATTR_NO_KERNEL_MAPPING
set. Extend this to non-CMA allocations too, to avoid cache
aliasing issues.

Change-Id: I133d34d79665ee7159fe384121e933d7768748c2
Signed-off-by: Vinayak Menon <vinmenon@codeaurora.org>