msm: mhi_dev: Add support to trigger MSI via EDMA

Some usecases of MHI use EDMA instead of IPA DMA.

EP PCIe triggers MSI via CPU. For usecases that uses EMDA,
possible NOC congestion can happen as multiple masters
(Controller, CPU) are accessing NOC for data transfers and
triggering MSI that might lead to NOC timeouts during high
throughput data transfers.

Add MSI trigger support for MHI to make sure that data transfers
and MSI (via EDMA) are triggerred by single master (PCIe controller)
for EDMA usecase.

Change-Id: Ie704522847a9a48e943ec78aea5a807d573dee8d
Signed-off-by: Rama Krishna Phani A <rphani@codeaurora.org>