dmaengine: dma_slave_config: add support for slave port window

 * may or may not be applicable on memory sources.

 * may or may not be applicable on memory sources.

 * @dst_maxburst: same as src_maxburst but for destination target

 * @dst_maxburst: same as src_maxburst but for destination target

 * mutatis mutandis.

 * mutatis mutandis.

 * @src_port_window_size: The length of the register area in words the data need

 * to be accessed on the device side. It is only used for devices which is using

 * an area instead of a single register to receive the data. Typically the DMA

 * loops in this area in order to transfer the data.

 * @dst_port_window_size: same as src_port_window_size but for the destination

 * port.

 * @device_fc: Flow Controller Settings. Only valid for slave channels. Fill

 * @device_fc: Flow Controller Settings. Only valid for slave channels. Fill

 * with 'true' if peripheral should be flow controller. Direction will be

 * with 'true' if peripheral should be flow controller. Direction will be

 * selected at Runtime.

 * selected at Runtime.

	enum dma_slave_buswidth dst_addr_width;

	enum dma_slave_buswidth dst_addr_width;

	u32 src_maxburst;

	u32 src_maxburst;

	u32 dst_maxburst;

	u32 dst_maxburst;

	u32 src_port_window_size;

	u32 dst_port_window_size;

	bool device_fc;

	bool device_fc;

	unsigned int slave_id;

	unsigned int slave_id;

};

};