net: net_utils: Move ip_to_string to lib/net_utils.c

The function string_to_ip is already in net_utils, which is
compiled unconditionally, but ip_to_string is currently only
accessible if the legacy network stack is selected. This
commit puts ip_to_string in net_utils.c and removes it from the
legacy network code.

Signed-off-by: Adriano Cordova <adrianox@gmail.com>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
diff --git a/include/net-common.h b/include/net-common.h
index 3cd0f34..b7a519e 100644
--- a/include/net-common.h
+++ b/include/net-common.h
@@ -426,6 +426,16 @@
  */
 struct in_addr string_to_ip(const char *s);
 
+/**
+ * ip_to_string() - Convert a string to ip address
+ *
+ * Implemented in lib/net_utils.c (built unconditionally)
+ *
+ * @x: Input ip to parse
+ * @s: string containing the parsed ip address
+ */
+void ip_to_string(struct in_addr x, char *s);
+
 /* copy a filename (allow for "..." notation, limit length) */
 void copy_filename(char *dst, const char *src, int size);
 
diff --git a/lib/net_utils.c b/lib/net_utils.c
index c70fef0..621f651 100644
--- a/lib/net_utils.c
+++ b/lib/net_utils.c
@@ -152,6 +152,17 @@
 }
 #endif
 
+void ip_to_string(struct in_addr x, char *s)
+{
+	x.s_addr = ntohl(x.s_addr);
+	sprintf(s, "%d.%d.%d.%d",
+		(int) ((x.s_addr >> 24) & 0xff),
+		(int) ((x.s_addr >> 16) & 0xff),
+		(int) ((x.s_addr >> 8) & 0xff),
+		(int) ((x.s_addr >> 0) & 0xff)
+	);
+}
+
 void string_to_enetaddr(const char *addr, uint8_t *enetaddr)
 {
 	char *end;
diff --git a/net/net.c b/net/net.c
index f47e9fb..ca35704 100644
--- a/net/net.c
+++ b/net/net.c
@@ -1723,17 +1723,6 @@
 	return 1;
 }
 
-void ip_to_string(struct in_addr x, char *s)
-{
-	x.s_addr = ntohl(x.s_addr);
-	sprintf(s, "%d.%d.%d.%d",
-		(int) ((x.s_addr >> 24) & 0xff),
-		(int) ((x.s_addr >> 16) & 0xff),
-		(int) ((x.s_addr >> 8) & 0xff),
-		(int) ((x.s_addr >> 0) & 0xff)
-	);
-}
-
 void vlan_to_string(ushort x, char *s)
 {
 	x = ntohs(x);