[settings] Create space for IPv6 in settings display order

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/include/ipxe/settings.h

 
 #define SETTING_NETDEV		01 /**< Network device settings */
 #define SETTING_NETDEV_EXTRA	02 /**< Network device additional settings */
-#define SETTING_IP		03 /**< IPv4 settings */
-#define SETTING_IP_EXTRA	04 /**< IPv4 additional settings */
-#define SETTING_BOOT		05 /**< Generic boot settings */
-#define SETTING_BOOT_EXTRA	06 /**< Generic boot additional settings */
-#define SETTING_SANBOOT		07 /**< SAN boot settings */
-#define SETTING_SANBOOT_EXTRA	08 /**< SAN boot additional settings */
-#define SETTING_HOST		09 /**< Host identity settings */
-#define SETTING_HOST_EXTRA	10 /**< Host identity additional settings */
-#define SETTING_AUTH		11 /**< Authentication settings */
-#define SETTING_AUTH_EXTRA	12 /**< Authentication additional settings */
-#define SETTING_CRYPTO		13 /**< Cryptography settings */
-#define SETTING_MISC		14 /**< Miscellaneous settings */
+#define SETTING_IP4		03 /**< IPv4 settings */
+#define SETTING_IP4_EXTRA	04 /**< IPv4 additional settings */
+#define SETTING_IP6		05 /**< IPv6 settings */
+#define SETTING_IP6_EXTRA	06 /**< IPv6 additional settings */
+#define SETTING_IP		07 /**< IPv4 settings */
+#define SETTING_IP_EXTRA	08 /**< IPv4 additional settings */
+#define SETTING_BOOT		09 /**< Generic boot settings */
+#define SETTING_BOOT_EXTRA	10 /**< Generic boot additional settings */
+#define SETTING_SANBOOT		11 /**< SAN boot settings */
+#define SETTING_SANBOOT_EXTRA	12 /**< SAN boot additional settings */
+#define SETTING_HOST		13 /**< Host identity settings */
+#define SETTING_HOST_EXTRA	14 /**< Host identity additional settings */
+#define SETTING_AUTH		15 /**< Authentication settings */
+#define SETTING_AUTH_EXTRA	16 /**< Authentication additional settings */
+#define SETTING_CRYPTO		17 /**< Cryptography settings */
+#define SETTING_MISC		18 /**< Miscellaneous settings */
 
 /** @} */
 
 extern const struct setting_type setting_type_dnssl __setting_type;
 
 extern const struct setting
-ip_setting __setting ( SETTING_IP, ip );
+ip_setting __setting ( SETTING_IP4, ip );
 extern const struct setting
-netmask_setting __setting ( SETTING_IP, netmask );
+netmask_setting __setting ( SETTING_IP4, netmask );
 extern const struct setting
-gateway_setting __setting ( SETTING_IP, gateway );
+gateway_setting __setting ( SETTING_IP4, gateway );
 extern const struct setting
-dns_setting __setting ( SETTING_IP_EXTRA, dns );
+dns_setting __setting ( SETTING_IP4_EXTRA, dns );
 extern const struct setting
 hostname_setting __setting ( SETTING_HOST, hostname );
 extern const struct setting

src/net/ipv4.c

 }
 
 /** IPv4 address setting */
-const struct setting ip_setting __setting ( SETTING_IP, ip ) = {
+const struct setting ip_setting __setting ( SETTING_IP4, ip ) = {
 	.name = "ip",
 	.description = "IP address",
 	.tag = DHCP_EB_YIADDR,
 };
 
 /** IPv4 subnet mask setting */
-const struct setting netmask_setting __setting ( SETTING_IP, netmask ) = {
+const struct setting netmask_setting __setting ( SETTING_IP4, netmask ) = {
 	.name = "netmask",
 	.description = "Subnet mask",
 	.tag = DHCP_SUBNET_MASK,
 };
 
 /** Default gateway setting */
-const struct setting gateway_setting __setting ( SETTING_IP, gateway ) = {
+const struct setting gateway_setting __setting ( SETTING_IP4, gateway ) = {
 	.name = "gateway",
 	.description = "Default gateway",
 	.tag = DHCP_ROUTERS,

src/net/ndp.c

 }
 
 /** DNS server setting */
-const struct setting ndp_dns6_setting __setting ( SETTING_IP_EXTRA, dns6 ) = {
+const struct setting ndp_dns6_setting __setting ( SETTING_IP6_EXTRA, dns6 ) = {
 	.name = "dns6",
 	.description = "DNS server",
 	.tag = NDP_TAG ( NDP_OPT_RDNSS,

src/net/udp/dns.c

 };
 
 /** IPv4 DNS server setting */
-const struct setting dns_setting __setting ( SETTING_IP_EXTRA, dns ) = {
+const struct setting dns_setting __setting ( SETTING_IP4_EXTRA, dns ) = {
 	.name = "dns",
 	.description = "DNS server",
 	.tag = DHCP_DNS_SERVERS,
 };
 
 /** IPv6 DNS server setting */
-const struct setting dns6_setting __setting ( SETTING_IP_EXTRA, dns6 ) = {
+const struct setting dns6_setting __setting ( SETTING_IP6_EXTRA, dns6 ) = {
 	.name = "dns6",
 	.description = "DNS server",
 	.tag = DHCPV6_DNS_SERVERS,