treewide: capitalize 'USB'

Change-Id: I7650786ea50465a4c2d11de948fdb81f4e509772
Signed-off-by: Elyes HAOUAS <ehaouas@noos.fr>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39100
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/samsung/stumpy/early_init.c b/src/mainboard/samsung/stumpy/early_init.c
index d7f9b90..13da85a 100644
--- a/src/mainboard/samsung/stumpy/early_init.c
+++ b/src/mainboard/samsung/stumpy/early_init.c
@@ -167,7 +167,7 @@
 }
 
 const struct southbridge_usb_port mainboard_usb_ports[] = {
-	/* enabled power  usb oc pin  */
+	/* enabled power  USB oc pin  */
 	{ 1, 1, 0 }, /* P0: Front port  (OC0) */
 	{ 1, 0, 1 }, /* P1: Back port   (OC1) */
 	{ 1, 0, -1 }, /* P2: MINIPCIE1   (no OC) */