ARM: dma-mapping: move all dma bounce code to separate dma ops structure

This patch removes dma bounce hooks from the common dma mapping
implementation on ARM architecture and creates a separate set of
dma_map_ops for dma bounce devices.

Change-Id: I42d7869b4f74ffa5f36a4a7526bc0c55aaf6bab7
[lauraa: conflicts due to code cruft]
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Tested-By: Subash Patel <subash.ramaswamy@linaro.org>
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>