ath5k: clean up base.h and its use

Remove unnecessary includes from base.h.  Add includes to other files as
necessary.  Don't include base.h unless needed.

Move declarations for functions in base.c from ath5k.h to base.h.

Use a better named define to protect base.h against double inclusion.

Signed-off-by: Pavel Roskin <proski@gnu.org>
Signed-off-by: John W. Linville <linville@tuxdriver.com>

drivers/net/wireless/ath/ath5k/trace.h

@@ -2,7 +2,6 @@
 #define __TRACE_ATH5K_H
 
 #include <linux/tracepoint.h>
-#include "base.h"
 
 #ifndef CONFIG_ATH5K_TRACER
 #undef TRACE_EVENT
@@ -11,6 +10,8 @@ static inline void trace_ ## name(proto) {}
 #endif
 
 struct sk_buff;
+struct ath5k_txq;
+struct ath5k_tx_status;
 
 #undef TRACE_SYSTEM
 #define TRACE_SYSTEM ath5k