vendorcode/amd/ccx_cppc_data.h: Fix header guard

Change-Id: I027c3aa7bb206112107ee120cf6f9854e37c5636
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/69230
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/vendorcode/amd/fsp/common/ccx_cppc_data.h

@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
-#ifndef COMMOM_FSP_CCX_CPPC_DATA_H
+#ifndef COMMON_FSP_CCX_CPPC_DATA_H
 #define COMMON_FSP_CCX_CPPC_DATA_H
 
 #include <types.h>