[media] usb/cpia2_core: clean up a min_t() cast

It makes sense to make the min_t() cast unsigned here since we don't
really want negative sizes.  Making it signed causes a static checker
warning in Smatch.  Smatch knows "fw->size - i" is positive but it
doesn't know that fw->size is less than INT_MAX so in theory casting it
to int might lead to a negative.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/usb/cpia2/cpia2_core.c

@@ -923,7 +923,7 @@ static int apply_vp_patch(struct camera_data *cam)
 	/* ... followed by the data payload */
 	for (i = 2; i < fw->size; i += 64) {
 		cmd.start = 0x0C; /* Data */
-		cmd.reg_count = min_t(int, 64, fw->size - i);
+		cmd.reg_count = min_t(uint, 64, fw->size - i);
 		memcpy(cmd.buffer.block_data, &fw->data[i], cmd.reg_count);
 		cpia2_send_command(cam, &cmd);
 	}