net: if: Make IPv4 address const in removal function

As the function does not touch IPv4 address in removal, we
can mark it const.

Signed-off-by: Jukka Rissanen <[email protected]>

Author: jukkar

include/net/net_if.h

@@ -1476,7 +1476,7 @@ struct net_if_addr *net_if_ipv4_addr_add(struct net_if *iface,
  *
  * @return True if successfully removed, false otherwise
  */
-bool net_if_ipv4_addr_rm(struct net_if *iface,  struct in_addr *addr);
+bool net_if_ipv4_addr_rm(struct net_if *iface, const struct in_addr *addr);
 
 /**
  * @brief Check if this IPv4 address belongs to one of the interface indices.

subsys/net/ip/net_if.c

@@ -2687,7 +2687,7 @@ struct net_if_addr *net_if_ipv4_addr_add(struct net_if *iface,
 	return NULL;
 }
 
-bool net_if_ipv4_addr_rm(struct net_if *iface, struct in_addr *addr)
+bool net_if_ipv4_addr_rm(struct net_if *iface, const struct in_addr *addr)
 {
 #if defined(CONFIG_NET_IPV4)
 	struct net_if_ipv4 *ipv4 = iface->config.ip.ipv4;