ASoC: sigmadsp: Drop support support SIGMA_ACTION_DELAY

The official firmware generation tool never emitted any SIGMA_ACTION_DELAY
instructions. Keeping support for it with the new restructured loader that
also supports v2 will be difficult, so drop support for it.

Signed-off-by: Lars-Peter Clausen <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

sound/soc/codecs/sigmadsp.c

···
  */
 
 #include <linux/crc32.h>
-#include <linux/delay.h>
 #include <linux/firmware.h>
 #include <linux/kernel.h>
 #include <linux/i2c.h>
···
 	SIGMA_ACTION_WRITEXBYTES = 0,
 	SIGMA_ACTION_WRITESINGLE,
 	SIGMA_ACTION_WRITESAFELOAD,
-	SIGMA_ACTION_DELAY,
-	SIGMA_ACTION_PLLWAIT,
-	SIGMA_ACTION_NOOP,
 	SIGMA_ACTION_END,
 };
 
···
 		ret = ssfw->write(ssfw->control_data, sa, len);
 		if (ret < 0)
 			return -EINVAL;
-		break;
-	case SIGMA_ACTION_DELAY:
-		udelay(len);
-		len = 0;
 		break;
 	case SIGMA_ACTION_END:
 		return 0;