net/: Remove lingering references to CFG_CMD_* symbols.

Fixed some broken instances of "#ifdef CMD_CFG_IDE" too.
Those always evaluated TRUE, and thus were always compiled
even when IDE really wasn't defined/wanted.

Signed-off-by: Jon Loeliger <jdl@freescale.com>
diff --git a/net/rarp.c b/net/rarp.c
index 921d0db..21dfa52 100644
--- a/net/rarp.c
+++ b/net/rarp.c
@@ -119,4 +119,4 @@
 	NetSetHandler(RarpHandler);
 }
 
-#endif /* CFG_CMD_NET */
+#endif