net/dhcpv4: Avoid ifdefs when using net_dhcpv4_init()

Just provide a macro of value 0 in case CONFIG_NET_DHCPV4 is unset.

Signed-off-by: Tomasz Bursztyka <[email protected]>

Author: Tomasz Bursztyka

subsys/net/ip/dhcpv4.h

@@ -118,6 +118,14 @@ enum dhcpv4_msg_type {
  */
 #define DHCPV4_INITIAL_DELAY_MIN 1
 
+#if defined(CONFIG_NET_DHCPV4)
+
 int net_dhcpv4_init(void);
 
+#else
+
+#define net_dhcpv4_init() 0
+
+#endif /* CONFIG_NET_DHCPV4 */
+
 #endif /* __INTERNAL_DHCPV4_H */