staging: rtl8192u/ieee80211: Fix sparse ieee80211_debug_init/_exit not declared warning

A sparse warning is generated about 'ieee80211_debug_init' and
'ieee80211_debug_exit' not being declared.

  drivers/staging/rtl8192u/ieee80211/ieee80211_module.c:275:12: warning:
  symbol 'ieee80211_debug_init' was not declared. Should it be static?
  drivers/staging/rtl8192u/ieee80211/ieee80211_module.c:297:13: warning:
  symbol 'ieee80211_debug_exit' was not declared. Should it be static?

These functions are used outside of this file so using static will not
work.  The prototypes are given in r8192U_core.c but sparse nonetheless
still gives a warning.  Fix the sparse warning by moving these
prototypes from r8192U_core.c to ieee80211.h.
Signed-off-by: Jeremiah Mahler <jmmahler@gmail.com>
Cc: Joel Pelaez Jorge <joelpelaez@gmail.com>
Cc: Andrea Merello <andrea.merello@gmail.com>
Cc: "John W. Linville" <linville@tuxdriver.com>
Cc: Joe Perches <joe@perches.com>
Cc: Himangi Saraogi <himangi774@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Peter P Waskiewicz Jr <peter.p.waskiewicz.jr@intel.com>
Cc: Ana Rey <anarey@gmail.com>
Cc: Chaitanya Hazarey <c@24.io>
Cc: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se>
Cc: Teodora Baluta <teobaluta@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8192u/ieee80211/ieee80211.h

@@ -2485,6 +2485,10 @@ extern int ieee80211_wx_set_freq(struct ieee80211_device *ieee, struct iw_reques
 extern int ieee80211_wx_get_freq(struct ieee80211_device *ieee, struct iw_request_info *a,
 			     union iwreq_data *wrqu, char *b);
 
+/* ieee80211_module.c */
+extern int ieee80211_debug_init(void);
+extern void ieee80211_debug_exit(void);
+
 //extern void ieee80211_wx_sync_scan_wq(struct ieee80211_device *ieee);
 extern void ieee80211_wx_sync_scan_wq(struct work_struct *work);
 

drivers/staging/rtl8192u/r8192U_core.c

@@ -4805,8 +4805,6 @@ static void rtl8192_usb_disconnect(struct usb_interface *intf)
 }
 
 /* fun with the built-in ieee80211 stack... */
-extern int ieee80211_debug_init(void);
-extern void ieee80211_debug_exit(void);
 extern int ieee80211_crypto_init(void);
 extern void ieee80211_crypto_deinit(void);
 extern int ieee80211_crypto_tkip_init(void);