msm: mhi_dev: add dma support for mhi

MHI needs DMA support for transfers. Add support for
mhi to register for DMA framework and use DMA api's
for transfers. MHI driver can choose to use IPA DMA
or PCIe eDMA based on the DMA supported on the target.
Add support to choose and program DMA accordingly.

Change-Id: I25201493395cb293749b49590db3b4ebc68ec16f
Signed-off-by: Rama Krishna Phani A <rphani@codeaurora.org>
Signed-off-by: Chandra Devireddy <cdevired@codeaurora.org>