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>

src/southbridge/amd/cimx/sb800/late.c

@@ -214,7 +214,7 @@ static struct device_operations usb_ops = {
 };
 
 /*
- * The pci id of usb ctrl 0 and 1 are the same.
+ * The pci id of USB ctrl 0 and 1 are the same.
  */
 static const struct pci_driver usb_ohci123_driver __pci_driver = {
 	.ops = &usb_ops,

src/southbridge/intel/i82801gx/early_init.c

@@ -99,7 +99,7 @@ void i82801gx_early_init(void)
 	reg8 &= ~RTC_BATTERY_DEAD;
 	pci_write_config8(PCI_DEV(0, 0x1f, 0), GEN_PMCON_3, reg8);
 
-	/* usb transient disconnect */
+	/* USB transient disconnect */
 	reg8 = pci_read_config8(PCI_DEV(0, 0x1f, 0), 0xad);
 	reg8 |= (3 << 0);
 	pci_write_config8(PCI_DEV(0, 0x1f, 0), 0xad, reg8);