UniPhier XDMAC support

modulename: uniphier-xdmac.ko

configname: CONFIG_UNIPHIER_XDMAC

Linux Kernel Configuration
└─>Device Drivers
└─>DMA Engine support
└─>Device Tree and Open Firmware support
└─>UniPhier XDMAC support
In linux kernel since version 5.1 (release Date: 2019-05-05)  
Enable support for the XDMAC (external DMA controller) on the
UniPhier platform. This DMA controller can transfer data from
memory to memory, memory to peripheral and peripheral to memory.

source code: