fix madwifi compile for 2.4

SVN-Revision: 7885

package/madwifi/patches/124-linux24_compat.patch

@@ -0,0 +1,16 @@
+Index: madwifi-ng-r2537-20070704/ath/if_athvar.h
+===================================================================
+--- madwifi-ng-r2537-20070704.orig/ath/if_athvar.h	2007-07-07 11:28:00.232371000 +0200
++++ madwifi-ng-r2537-20070704/ath/if_athvar.h	2007-07-07 11:28:09.784968000 +0200
+@@ -118,6 +118,11 @@
+ #define ATH_GET_NETDEV_DEV(ndev)	((ndev)->class_dev.dev)
+ #endif
+ 
++#ifndef NETDEV_TX_OK
++#define NETDEV_TX_OK    0
++#define NETDEV_TX_BUSY  1
++#endif
++
+ #if LINUX_VERSION_CODE < KERNEL_VERSION(2,4,23)
+ static inline struct net_device *_alloc_netdev(int sizeof_priv, const char *mask,
+ 					       void (*setup)(struct net_device *))