drivers: dma: Add pl330 dma driver

Add PL330 dma driver support, this driver
- supports 32 bit memory to memory operation
- supports 36 bit memory to memory operation
  under a config flag DMA_64BIT
- supports secure channel

Signed-off-by: Raveendra Padasalagi <raveendra.padasalagi@broadcom.com>
6 files changed