arm: dma: Expand the page protection attributes

Currently, the decision on which page protection to use
is limited to writecombine and coherent. Expand to include
strongly ordered memory and non consistent memory.

Change-Id: I7585fe3ce804cf321a5585c3d93deb7a7c95045c
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
Signed-off-by: Charan Teja Reddy <charante@codeaurora.org>