elog: make elog's SMM handler code follow everything else

Instead of ELOG_GSMI_APM_CNT use APM_CNT_ELOG_GSMI and define it in
cpu/x86/smm.h

Change-Id: I3a3e2f823c91b475d1e15b8c20e9cf5f3fd9de83
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/c/30022
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/include/cpu/x86/smm.h

@@ -473,6 +473,7 @@ typedef struct {
 #define APM_CNT_GNVS_UPDATE	0xea
 #define APM_CNT_FINALIZE	0xcb
 #define APM_CNT_LEGACY		0xcc
+#define APM_CNT_ELOG_GSMI	0xef
 #define APM_STS		0xb3
 
 /* SMI handler function prototypes */

src/include/elog.h

@@ -16,9 +16,6 @@
 #ifndef ELOG_H_
 #define ELOG_H_
 
-/* SMI command code for GSMI event logging */
-#define ELOG_GSMI_APM_CNT                 0xEF
-
 #define MAX_EVENT_SIZE                    0x7F
 
 /* End of log */