i2c: at91: remove legacy DMA left overs

Commit dc6df6e90de9 ("i2c: at91: remove legacy DMA support") removed legcy
DMA support from the driver. Remove the last use of the definitions from
linux/platform_data/dma-atmel.h and stop including this header.

Signed-off-by: Alexandre Belloni <[e-mail]>
Reviewed-by: Codrin Ciubotariu <[e-mail]>
[wsa: fixed typo in subject]
Signed-off-by: Wolfram Sang <[e-mail]>

drivers/i2c/busses/i2c-at91-master.c

···
 #include <linux/of_device.h>
 #include <linux/pinctrl/consumer.h>
 #include <linux/platform_device.h>
-#include <linux/platform_data/dma-atmel.h>
 #include <linux/pm_runtime.h>
 
 #include "i2c-at91.h"

drivers/i2c/busses/i2c-at91.h

···
 #include <linux/dma-mapping.h>
 #include <linux/dmaengine.h>
 #include <linux/i2c.h>
-#include <linux/platform_data/dma-atmel.h>
 #include <linux/platform_device.h>
 
 #define AT91_I2C_TIMEOUT	msecs_to_jiffies(100)	/* transfer timeout */
···
 	bool has_adv_dig_filtr;
 	bool has_ana_filtr;
 	bool has_clear_cmd;
-	struct at_dma_slave dma_slave;
 };
 
 struct at91_twi_dma {