wireless: move regulatory_init to .init.text

regulatory_init is only called by cfg80211_init which is in .init.text,
too.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/wireless/reg.h b/net/wireless/reg.h
index b26224a..c4695d0 100644
--- a/net/wireless/reg.h
+++ b/net/wireless/reg.h
@@ -10,7 +10,7 @@
 
 void reg_device_remove(struct wiphy *wiphy);
 
-int regulatory_init(void);
+int __init regulatory_init(void);
 void regulatory_exit(void);
 
 int set_regdom(const struct ieee80211_regdomain *rd);