Make the "drive number" option apply to iSCSI as well as AoE

src/tests/dhcptest.c

 		struct sockaddr_in sin;
 		struct sockaddr_tcpip st;
 	} target;
-
+	unsigned int drivenum;
+	
 	memset ( &target, 0, sizeof ( target ) );
 	target.sin.sin_family = AF_INET;
 	target.sin.sin_port = htons ( ISCSI_PORT );
 	dhcp_snprintf ( password, sizeof ( password ),
 			find_global_dhcp_option ( DHCP_EB_PASSWORD ) );
 
+	drivenum = find_global_dhcp_num_option ( DHCP_EB_BIOS_DRIVE );
+
 	return test_iscsiboot ( initiator_iqn, &target.st, target_iqn,
-				username, password, netdev );
+				username, password, netdev, drivenum );
 }
 
 static int test_dhcp_hello ( char *helloname ) {

src/tests/iscsiboot.c

 		     const char *target_iqn,
 		     const char *username,
 		     const char *password,
-		     struct net_device *netdev ) {
+		     struct net_device *netdev,
+		     unsigned int drivenum ) {
 	struct int13_drive drive;
 	int rc;
 
 	ibft_fill_data ( netdev, initiator_iqn, target, target_iqn );
 #endif
 	memset ( &drive, 0, sizeof ( drive ) );
+	drive.drive = drivenum;
 	drive.blockdev = &test_iscsidev.scsi.blockdev;
 	register_int13_drive ( &drive );
 	printf ( "Registered %s as BIOS drive %#02x\n",