cpu/ rtc/ include/: Remove lingering references to CFG_CMD_* symbols.

Signed-off-by: Jon Loeliger <jdl@freescale.com>
diff --git a/rtc/ds1307.c b/rtc/ds1307.c
index a2a8633..c882d79 100644
--- a/rtc/ds1307.c
+++ b/rtc/ds1307.c
@@ -201,4 +201,4 @@
 	return (((n / 10) << 4) | (n % 10));
 }
 
-#endif /* (CONFIG_RTC_DS1307 || CONFIG_RTC_DS1338) && (CFG_COMMANDS & CFG_CMD_DATE) */
+#endif