iwlagn: all function iwl-io.c receive iwl_bus

Which means that iwl-io.c doesn't need to include iwl-dev.h any more.

Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Wey-Yi Guy <wey-yi.w.guy@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/drivers/net/wireless/iwlwifi/iwl-devtrace.h b/drivers/net/wireless/iwlwifi/iwl-devtrace.h
index 2c84ba95..8a51c5c 100644
--- a/drivers/net/wireless/iwlwifi/iwl-devtrace.h
+++ b/drivers/net/wireless/iwlwifi/iwl-devtrace.h
@@ -29,6 +29,8 @@
 
 #include <linux/tracepoint.h>
 
+struct iwl_priv;
+
 #if !defined(CONFIG_IWLWIFI_DEVICE_TRACING) || defined(__CHECKER__)
 #undef TRACE_EVENT
 #define TRACE_EVENT(name, proto, ...) \