include/pc80/mc146818rtc.h: Inconsequential, comment ifdef maze

Change-Id: Ie1ec8dbcdbbe0f2b05fdb10b1dca43cfee2a58cb
Signed-off-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Reviewed-on: http://review.coreboot.org/6120
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <patrick@georgi-clan.de>
diff --git a/src/include/pc80/mc146818rtc.h b/src/include/pc80/mc146818rtc.h
index 56f8caf..a401821 100644
--- a/src/include/pc80/mc146818rtc.h
+++ b/src/include/pc80/mc146818rtc.h
@@ -187,9 +187,9 @@
 				{ return CB_CMOS_OTABLE_DISABLED; }
 #define read_option_lowlevel(start, size, def) def
 #endif
-#else
+#else /* defined(__ROMCC__) */
 #include <drivers/pc80/mc146818rtc_early.c>
-#endif
+#endif /* !defined(__ROMCC__) */
 #define read_option(name, default) read_option_lowlevel(CMOS_VSTART_ ##name, CMOS_VLEN_ ##name, (default))
 
 #if CONFIG_CMOS_POST