[build] Fix misaligned table entries when using gcc 4.5

Declarations without the accompanying __table_entry cause misalignment
of the table entries when using gcc 4.5.  Fix by adding the
appropriate __table_entry macro or (where possible) by removing
unnecessary forward declarations.

Signed-off-by: Piotr Jaroszyński <p.jaroszynski@gmail.com>
Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/arch/i386/core/video_subr.c

 #include <ipxe/init.h>
 #include "vga.h"
 
-struct console_driver vga_console;
+struct console_driver vga_console __console_driver;
 
 static char *vidmem;		/* The video buffer */
 static int video_line, video_col;

src/include/ipxe/arp.h

 FILE_LICENCE ( GPL2_OR_LATER );
 
 #include <ipxe/tables.h>
-
-struct net_device;
-struct net_protocol;
+#include <ipxe/netdevice.h>
 
 /** A network-layer protocol that relies upon ARP */
 struct arp_net_protocol {
 /** Declare an ARP protocol */
 #define __arp_net_protocol __table_entry ( ARP_NET_PROTOCOLS, 01 )
 
-extern struct net_protocol arp_protocol;
+extern struct net_protocol arp_protocol __net_protocol;
 
 extern int arp_resolve ( struct net_device *netdev,
 			 struct net_protocol *net_protocol,

src/include/ipxe/icmp6.h

 #define ICMP6_NSOLICIT 135
 #define ICMP6_NADVERT 136
 
-extern struct tcpip_protocol icmp6_protocol;
+extern struct tcpip_protocol icmp6_protocol __tcpip_protocol;
 
 struct icmp6_header {
 	uint8_t type;

src/include/ipxe/ip.h

 #include <ipxe/in.h>
 #include <ipxe/list.h>
 #include <ipxe/retry.h>
+#include <ipxe/netdevice.h>
 
 struct io_buffer;
-struct net_device;
-struct net_protocol;
 
 /* IP constants */
 
 
 extern struct list_head ipv4_miniroutes;
 
-extern struct net_protocol ipv4_protocol;
+extern struct net_protocol ipv4_protocol __net_protocol;
 
 #endif /* _IPXE_IP_H */

src/include/ipxe/ip6.h

 
 #include <stdint.h>
 #include <ipxe/in.h>
+#include <ipxe/netdevice.h>
+#include <ipxe/tcpip.h>
 
 /* IP6 constants */
 
 #define IP6_NO_HEADER		0x59
 
 struct io_buffer;
-struct net_device;
-struct net_protocol;
 
-extern struct net_protocol ipv6_protocol;
-extern struct tcpip_net_protocol ipv6_tcpip_protocol;
+extern struct net_protocol ipv6_protocol __net_protocol;
+extern struct tcpip_net_protocol ipv6_tcpip_protocol __tcpip_net_protocol;
 extern char * inet6_ntoa ( struct in6_addr in6 );
 
 extern int add_ipv6_address ( struct net_device *netdev,

src/include/ipxe/rarp.h

 
 FILE_LICENCE ( GPL2_OR_LATER );
 
-struct net_protocol;
+#include <ipxe/netdevice.h>
 
-extern struct net_protocol rarp_protocol;
+extern struct net_protocol rarp_protocol __net_protocol;
 
 #endif /* _IPXE_RARP_H */

src/include/ipxe/tcp.h

 	return ( ( seq - start ) < len );
 }
 
-extern struct tcpip_protocol tcp_protocol;
+extern struct tcpip_protocol tcp_protocol __tcpip_protocol;
 
 #endif /* _IPXE_TCP_H */

src/net/aoe.c

 
 FEATURE ( FEATURE_PROTOCOL, "AoE", DHCP_EB_FEATURE_AOE, 1 );
 
-struct net_protocol aoe_protocol;
+struct net_protocol aoe_protocol __net_protocol;
 
 /** List of all AoE sessions */
 static LIST_HEAD ( aoe_sessions );

src/net/arp.c

 
 static unsigned int next_new_arp_entry = 0;
 
-struct net_protocol arp_protocol;
+struct net_protocol arp_protocol __net_protocol;
 
 /**
  * Find entry in the ARP cache

src/net/eth_slow.c

  * partner sends us.
  */
 
-struct net_protocol eth_slow_protocol;
+struct net_protocol eth_slow_protocol __net_protocol;
 
 /** Slow protocols multicast address */
 static const uint8_t eth_slow_address[ETH_ALEN] =

src/net/icmpv6.c

 #include <ipxe/tcpip.h>
 #include <ipxe/netdevice.h>
 
-struct tcpip_protocol icmp6_protocol;
-
 /**
  * Send neighbour solicitation packet
  *

src/net/ipv4.c

 /* Unique IP datagram identification number */
 static uint16_t next_ident = 0;
 
-struct net_protocol ipv4_protocol;
-
 /** List of IPv4 miniroutes */
 struct list_head ipv4_miniroutes = LIST_HEAD_INIT ( ipv4_miniroutes );
 

src/net/ipv6.c

 #include <ipxe/netdevice.h>
 #include <ipxe/if_ether.h>
 
-struct net_protocol ipv6_protocol;
-
 /* Unspecified IP6 address */
 static struct in6_addr ip6_none = {
         .in6_u.u6_addr32 = { 0,0,0,0 }

src/net/udp.c

 
 /* Forward declatations */
 static struct interface_descriptor udp_xfer_desc;
-struct tcpip_protocol udp_protocol;
+struct tcpip_protocol udp_protocol __tcpip_protocol;
 
 /**
  * Bind UDP connection to local port