HID: mcp2221: Remove unnecessary semicolon

Remove unnecessary semicolon at the end of the switch statement.
This is detected by coccinelle.

Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Reviewed-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Link: https://patch.msgid.link/20240709012223.17393-1-nichen@iscas.ac.cn
Signed-off-by: Benjamin Tissoires <bentiss@kernel.org>

Author: Chen Ni

drivers/hid/hid-mcp2221.c

@@ -1048,7 +1048,7 @@ static int mcp_iio_channels(struct mcp2221 *mcp)
 			break;
 		default:
 			continue;
-		};
+		}
 
 		chan->type = IIO_VOLTAGE;
 		chan->indexed = 1;