net: pull CONFIG checks out of source and into makefile

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>

net/net.c

@@ -96,8 +96,6 @@
 #include "dns.h"
 #endif
 
-#if defined(CONFIG_CMD_NET)
-
 DECLARE_GLOBAL_DATA_PTR;
 
 #ifndef	CONFIG_ARP_TIMEOUT
@@ -1872,8 +1870,6 @@ void copy_filename (char *dst, char *src, int size)
 	*dst = '\0';
 }
 
-#endif
-
 #if defined(CONFIG_CMD_NFS) || defined(CONFIG_CMD_SNTP) || defined(CONFIG_CMD_DNS)
 /*
  * make port a little random, but use something trivial to compute