Fixed the DHCP/BOOTP/RARP regression introduced in u-boot-2009.06
by initializing our IP addr to 0 in order to accept any IP addr
assigned to us by the DHCP/BOOTP/RARP server.
Ack-by: Robin Getz <rgetz@blackfin.uclinux.org>
Signed-off-by: Michael Zaidman <michael.zaidman@gmail.com>
Signed-off-by: Ben Warren <biggerbadderben@gmail.com>
 #if defined(CONFIG_CMD_DHCP)
                case DHCP:
                        BootpTry = 0;
+                       NetOurIP = 0;
                        DhcpRequest();          /* Basically same as BOOTP */
                        break;
 #endif
 
                case BOOTP:
                        BootpTry = 0;
+                       NetOurIP = 0;
                        BootpRequest ();
                        break;
 
                case RARP:
                        RarpTry = 0;
+                       NetOurIP = 0;
                        RarpRequest ();
                        break;
 #if defined(CONFIG_CMD_PING)