dmaengine: edma: Porting of EDMA driver from 4.14 to 5.4

EDMA is part of QCOM PCIe controller that provides
DMA capabilities for clients. By using PCIe eDMA
driver, clients can use a standardize interface
that is protocol independent to transfer data
between DDR and peripheral. Add snapshot for EDMA
driver from msm-4.14 commit 7c14ff7b3046f60
("msm: camera: csiphy: Align CSIPHY 1.2 settings to HPG").
Additional changes are made to edma_alloc_transfer_list
api and pass check_patch errors.

Change-Id: I4d93fd36166897de8fc77254d31120bdd9ed90e5
Signed-off-by: Nitesh Gupta <nitegupt@codeaurora.org>