linux-phytec-ti

HACK: dma-mapping: add non-zeroing coherent alloc function

Add a new function, dma_malloc_from_coherent(), which
takes a parameter that specifies if the allocated memory
should be zero-ed or not. Modify dma_alloc_from_coherent
to call dma_malloc_from_coherent with the flag set to
true in order to zero the memory. In this way
dma_alloc_from_coherent behaves the same as before.

Signed-off-by: Angela Stegmaier <angelabaker@ti.com>
Signed-off-by: Keerthy <j-keerthy@ti.com>
Signed-off-by: Suman Anna <s-anna@ti.com>