[ipv6] Rename ipv6_scope to ipv6_settings_scope

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

src/include/ipxe/settings.h

 extern const struct settings_scope builtin_scope;
 
 /** IPv6 setting scope */
-extern const struct settings_scope ipv6_scope;
+extern const struct settings_scope ipv6_settings_scope;
 
 /** DHCPv6 setting scope */
 extern const struct settings_scope dhcpv6_scope;

src/net/ipv6.c

 }
 
 /** IPv6 settings scope */
-const struct settings_scope ipv6_scope;
+const struct settings_scope ipv6_settings_scope;
 
 /** IPv6 address setting */
 const struct setting ip6_setting __setting ( SETTING_IP6, ip6 ) = {
 	.name = "ip6",
 	.description = "IPv6 address",
 	.type = &setting_type_ipv6,
-	.scope = &ipv6_scope,
+	.scope = &ipv6_settings_scope,
 };
 
 /** IPv6 prefix length setting */
 	.name = "len6",
 	.description = "IPv6 prefix length",
 	.type = &setting_type_int8,
-	.scope = &ipv6_scope,
+	.scope = &ipv6_settings_scope,
 };
 
 /** Default gateway setting */
 	.name = "gateway6",
 	.description = "IPv6 gateway",
 	.type = &setting_type_ipv6,
-	.scope = &ipv6_scope,
+	.scope = &ipv6_settings_scope,
 };
 
 /**
 static int ipv6_applies ( struct settings *settings __unused,
 			  const struct setting *setting ) {
 
-	return ( setting->scope == &ipv6_scope );
+	return ( setting->scope == &ipv6_settings_scope );
 }
 
 /**
 	}
 	ref_init ( &ipv6set->refcnt, NULL );
 	settings_init ( &ipv6set->settings, &ipv6_settings_operations,
-			&ipv6set->refcnt, &ipv6_scope );
+			&ipv6set->refcnt, &ipv6_settings_scope );
 	ipv6set->settings.order = IPV6_ORDER_LINK_LOCAL;
 
 	/* Register settings */

src/net/ndp.c

 static int ndp_prefix_applies ( struct settings *settings __unused,
 				const struct setting *setting ) {
 
-	return ( setting->scope == &ipv6_scope );
+	return ( setting->scope == &ipv6_settings_scope );
 }
 
 /**