superio/{aspeed,nuvoton}: Fix typo

Change-Id: I7772fadc756ceeef5988e4b1ecf8f93ad3605a84
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/37502
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
diff --git a/src/superio/aspeed/ast2400/superio.c b/src/superio/aspeed/ast2400/superio.c
index c5df8b5..a41bba7 100644
--- a/src/superio/aspeed/ast2400/superio.c
+++ b/src/superio/aspeed/ast2400/superio.c
@@ -48,9 +48,9 @@
 		return NULL;
 
 	switch (dev->path.pnp.device & 0xff) {
-	case AST2400_SUART1: /* falltrough */
-	case AST2400_SUART2: /* falltrough */
-	case AST2400_SUART3: /* falltrough */
+	case AST2400_SUART1: /* fallthrough */
+	case AST2400_SUART2: /* fallthrough */
+	case AST2400_SUART3: /* fallthrough */
 	case AST2400_SUART4:
 		return ACPI_HID_COM;
 	case AST2400_KBC: