post: during post_code, only call elog when enabled

Now that we call post_code in other stages other than RAMSTAGE, we need
to guard the elog calls with the appropriate condition in order to
compile correctly.

Change-Id: I766c276f28d46492fb05e0e3be71853e21f4e8e0
Signed-off-by: Jett Rink <jettrink@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32914
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Duncan Laurie <dlaurie@chromium.org>

src/console/post.c

@@ -81,7 +81,7 @@ void cmos_post_log(void)
 	default:
 		printk(BIOS_WARNING, "POST: Unexpected post code "
 		       "in previous boot: 0x%02x\n", code);
-#if CONFIG(ELOG)
+#if CONFIG(ELOG) && (ENV_RAMSTAGE || CONFIG(ELOG_PRERAM))
 		elog_add_event_word(ELOG_TYPE_LAST_POST_CODE, code);
 #if CONFIG(CMOS_POST_EXTRA)
 		if (extra)