Update Linux to v5.10.109

Sourced from [1]

[1] https://cdn.kernel.org/pub/linux/kernel/v5.x/linux-5.10.109.tar.xz

Change-Id: I19bca9fc6762d4e63bcf3e4cba88bbe560d9c76c
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
diff --git a/drivers/usb/serial/upd78f0730.c b/drivers/usb/serial/upd78f0730.c
index 1ba1401..0a2268c 100644
--- a/drivers/usb/serial/upd78f0730.c
+++ b/drivers/usb/serial/upd78f0730.c
@@ -332,7 +332,7 @@
 		tty->termios.c_cflag &= ~CSIZE;
 		tty->termios.c_cflag |= CS8;
 		dev_warn(dev, "data size is not supported, using 8 bits\n");
-		/* fall through */
+		fallthrough;
 	case CS8:
 		request.params |= UPD78F0730_DATA_SIZE_8_BITS;
 		dev_dbg(dev, "%s - 8 data bits\n", __func__);