Conditionally include mc146818rtc in console.c

get_option() is used to get a config option (debug loglevel) from
CMOS. However, not all machines have CMOS, so define a dummy inline
function that will return an error code so the caller (console_init())
will use the default loglevel.

Change-Id: I6adf371d79164178f40a83f7608289a6a7673357
Signed-off-by: David Hendricks <dhendrix@chromium.org>
Reviewed-on: http://review.coreboot.org/1962
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/console/console.c

@@ -24,7 +24,17 @@
 
 #ifndef __PRE_RAM__
 #include <string.h>
+
+/*
+ * FIXME: get_option() needs to be abstracted better so that other non-volatile
+ * storage can be used. This will benefit machines without CMOS as well as those
+ * without a battery-backed CMOS (e.g. some laptops).
+ */
+#ifdef HAVE_CMOS_DEFAULT
 #include <pc80/mc146818rtc.h>
+#else
+static inline int get_option(void *dest, const char *name) { return -1; }
+#endif
 
 /* initialize the console */
 void console_init(void)