media: siano: Simplify smscore_load_firmware_from_file

The function is never called with a loadfirmware_handler, so we can
remove some dead code.

We can also use this as a excuse to remove some unused type definitions.

This fixes the following smatch warning:
drivers/media/common/siano/smscoreapi.c:1172 smscore_load_firmware_from_file() error: we previously assumed 'loadfirmware_handler' could be null (see line 1150)

Signed-off-by: Ricardo Ribalda <[e-mail]>
Reported-by: Hans Verkuil <[e-mail]>
Closes: https://lore.kernel.org/linux-media/[e-mail]/T/#t
Signed-off-by: Hans Verkuil <[e-mail]>

drivers/media/common/siano/smscoreapi.c

···
  * return: 0 on success, <0 on error.
  */
 static int smscore_load_firmware_from_file(struct smscore_device_t *coredev,
-					   int mode,
-					   loadfirmware_t loadfirmware_handler)
+					   int mode)
 {
 	int rc = -ENOENT;
 	u8 *fw_buf;
···
 	}
 	pr_debug("Firmware name: %s\n", fw_filename);
 
-	if (!loadfirmware_handler &&
-	    !(coredev->device_flags & SMS_DEVICE_FAMILY2))
+	if (!(coredev->device_flags & SMS_DEVICE_FAMILY2))
 		return -EINVAL;
 
 	rc = request_firmware(&fw, fw_filename, coredev->device);
···
 		memcpy(fw_buf, fw->data, fw->size);
 		fw_buf_size = fw->size;
 
-		rc = (coredev->device_flags & SMS_DEVICE_FAMILY2) ?
-			smscore_load_firmware_family2(coredev, fw_buf, fw_buf_size)
-			: loadfirmware_handler(coredev->context, fw_buf,
-			fw_buf_size);
+		rc = smscore_load_firmware_family2(coredev, fw_buf,
+						   fw_buf_size);
 	}
 
 	kfree(fw_buf);
···
 		}
 
 		if (!(coredev->modes_supported & (1 << mode))) {
-			rc = smscore_load_firmware_from_file(coredev,
-							     mode, NULL);
+			rc = smscore_load_firmware_from_file(coredev, mode);
 			if (rc >= 0)
 				pr_debug("firmware download success\n");
 		} else {

drivers/media/common/siano/smscoreapi.h

···
 typedef int (*setmode_t)(void *context, int mode);
 typedef void (*detectmode_t)(void *context, int *mode);
 typedef int (*sendrequest_t)(void *context, void *buffer, size_t size);
-typedef int (*loadfirmware_t)(void *context, void *buffer, size_t size);
 typedef int (*preload_t)(void *context);
 typedef int (*postload_t)(void *context);
 
···
 extern void smscore_unregister_device(struct smscore_device_t *coredev);
 
 extern int smscore_start_device(struct smscore_device_t *coredev);
-extern int smscore_load_firmware(struct smscore_device_t *coredev,
-				 char *filename,
-				 loadfirmware_t loadfirmware_handler);
 
 extern int smscore_set_device_mode(struct smscore_device_t *coredev, int mode);
 extern int smscore_get_device_mode(struct smscore_device_t *coredev);