*.h: Fix up typos in guarding

Clang complains about this.

Change-Id: I421d6c5daa373d1537e4ac2243438e7f1f6208d1
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/63067
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/src/mainboard/intel/dcp847ske/usb.h b/src/mainboard/intel/dcp847ske/usb.h
index 0787ed3..2469309 100644
--- a/src/mainboard/intel/dcp847ske/usb.h
+++ b/src/mainboard/intel/dcp847ske/usb.h
@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
 #ifndef DCP847SKE_USB_H
-#define DPC847SKE_USB_H
+#define DCP847SKE_USB_H
 
 USB_CONFIG(1, 1, 0), /* back, towards HDMI plugs */
 USB_CONFIG(1, 1, 0), /* back, towards power plug */