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

Signed-off-by: Jon Loeliger <jdl@freescale.com>
diff --git a/rtc/date.c b/rtc/date.c
index d00b144..a83a723 100644
--- a/rtc/date.c
+++ b/rtc/date.c
@@ -153,4 +153,4 @@
 	)*60 + sec; /* finally seconds */
 }
 
-#endif	/* CFG_CMD_DATE */
+#endif