vc/amd/fsp: Get rid of last "sabrina" reference

We still had a lingering reference to the old sabrina codename in the
vendorcode directory.  Searching through the code now, the only places
the sabrina codename is seen is in the release notes, as is proper.

Signed-off-by: Martin Roth <gaumless@gmail.com>
Change-Id: I41762880b45a85ce7cd4210b8ce623076d874c06
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68645
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Matt DeVillier <matt.devillier@amd.corp-partner.google.com>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

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

@@ -1,7 +1,7 @@
 /* SPDX-License-Identifier: GPL-2.0-only */
 
-#ifndef SABRINA_FSP_CCX_CPPC_DATA_H
-#define SABRINA_FSP_CCX_CPPC_DATA_H
+#ifndef FSP_MDN_CCX_CPPC_DATA_H
+#define FSP_MDN_CCX_CPPC_DATA_H
 
 #include <types.h>
 
@@ -14,4 +14,4 @@ struct fsp_ccx_cppc_data {
 	uint32_t ccx_cppc_nom_speed;
 } __packed;
 
-#endif /* SABRINA_FSP_CCX_CPPC_DATA_H */
+#endif /* FSP_MDN_CCX_CPPC_DATA_H */