[ipv6] Rename sin_{family,port} to sin6_{family,port} in struct sockaddr_in6

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

src/include/ipxe/in.h

 	 *
 	 * Always set to @c AF_INET6 for IPv6 addresses
 	 */
-	sa_family_t sin_family;
+	sa_family_t sin6_family;
 	/** TCP/IP port (part of struct @c sockaddr_tcpip) */
-	uint16_t 	sin_port;
+	uint16_t sin6_port;
         uint32_t        sin6_flowinfo;  /* Flow number */
         struct in6_addr sin6_addr;      /* 128-bit destination address */
         uint32_t        sin6_scope_id;  /* Scope ID */

src/net/icmpv6.c

 	nsolicit->csum = tcpip_chksum ( nsolicit, sizeof ( *nsolicit ) );
 
 	/* Solicited multicast address */
-	st_dest.sin6.sin_family = AF_INET6;
+	st_dest.sin6.sin6_family = AF_INET6;
 	st_dest.sin6.sin6_addr.in6_u.u6_addr8[0] = 0xff;
 	st_dest.sin6.sin6_addr.in6_u.u6_addr8[2] = 0x02;
 	st_dest.sin6.sin6_addr.in6_u.u6_addr16[1] = 0x0000;

src/net/ipv6.c

 
 	/* Construct socket address */
 	memset ( &src, 0, sizeof ( src ) );
-	src.sin6.sin_family = AF_INET6;
+	src.sin6.sin6_family = AF_INET6;
 	src.sin6.sin6_addr = ip6hdr->src;
 	memset ( &dest, 0, sizeof ( dest ) );
-	dest.sin6.sin_family = AF_INET6;
+	dest.sin6.sin6_family = AF_INET6;
 	dest.sin6.sin6_addr = ip6hdr->dest;
 
 	/* Strip header */