[media] usbvision: Replace memcpy with struct assignment

This kind of memcpy() is error-prone. Its replacement with a struct
assignment is prefered because it's type-safe and much easier to read.
Found by coccinelle. Hand patched and reviewed.
Tested by compilation only.
A simplified version of the semantic match that finds this problem is as
follows: (http://coccinelle.lip6.fr/)
// <smpl>
@@
identifier struct_name;
struct struct_name to;
struct struct_name from;
expression E;
@@
-memcpy(&(to), &(from), E);
+to = from;
// </smpl>

Signed-off-by: Peter Senna Tschudin <peter.senna@gmail.com>
Signed-off-by: Ezequiel Garcia <elezegarcia@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/usb/usbvision/usbvision-i2c.c

@@ -189,8 +189,7 @@ int usbvision_i2c_register(struct usb_usbvision *usbvision)
 	if (usbvision->registered_i2c)
 		return 0;
 
-	memcpy(&usbvision->i2c_adap, &i2c_adap_template,
-	       sizeof(struct i2c_adapter));
+	usbvision->i2c_adap = i2c_adap_template;
 
 	sprintf(usbvision->i2c_adap.name, "%s-%d-%s", i2c_adap_template.name,
 		usbvision->dev->bus->busnum, usbvision->dev->devpath);