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

Signed-off-by: Jon Loeliger <jdl@freescale.com>
diff --git a/cpu/mpc8xx/fec.c b/cpu/mpc8xx/fec.c
index 10d825f..08a3715 100644
--- a/cpu/mpc8xx/fec.c
+++ b/cpu/mpc8xx/fec.c
@@ -1022,4 +1022,4 @@
 }
 #endif
 
-#endif	/* CFG_CMD_NET, FEC_ENET */
+#endif