media: i2c: imx208: Use const 'struct bin_attribute' callback

The sysfs core now provides callback variants that explicitly take a
const pointer. Make use of it to match the attribute definition.

Signed-off-by: Thomas Weißschuh <[e-mail]>
Signed-off-by: Sakari Ailus <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/i2c/imx208.c

···
 }
 
 static ssize_t otp_read(struct file *filp, struct kobject *kobj,
-			struct bin_attribute *bin_attr,
+			const struct bin_attribute *bin_attr,
 			char *buf, loff_t off, size_t count)
 {
 	struct i2c_client *client = to_i2c_client(kobj_to_dev(kobj));