Move extern declarations for autoscan modules into a header file

This gets rid of number of sparse warnings and also allows the
compatibility of the declarations to be verified.

Signed-off-by: Jouni Malinen <j@w1.fi>

wpa_supplicant/autoscan.c

@@ -16,13 +16,6 @@
 #include "scan.h"
 #include "autoscan.h"
 
-#ifdef CONFIG_AUTOSCAN_EXPONENTIAL
-extern const struct autoscan_ops autoscan_exponential_ops;
-#endif /* CONFIG_AUTOSCAN_EXPONENTIAL */
-
-#ifdef CONFIG_AUTOSCAN_PERIODIC
-extern const struct autoscan_ops autoscan_periodic_ops;
-#endif /* CONFIG_AUTOSCAN_PERIODIC */
 
 static const struct autoscan_ops * autoscan_modules[] = {
 #ifdef CONFIG_AUTOSCAN_EXPONENTIAL

wpa_supplicant/autoscan.h

@@ -27,6 +27,16 @@ void autoscan_deinit(struct wpa_supplicant *wpa_s);
 int autoscan_notify_scan(struct wpa_supplicant *wpa_s,
 			 struct wpa_scan_results *scan_res);
 
+/* Available autoscan modules */
+
+#ifdef CONFIG_AUTOSCAN_EXPONENTIAL
+extern const struct autoscan_ops autoscan_exponential_ops;
+#endif /* CONFIG_AUTOSCAN_EXPONENTIAL */
+
+#ifdef CONFIG_AUTOSCAN_PERIODIC
+extern const struct autoscan_ops autoscan_periodic_ops;
+#endif /* CONFIG_AUTOSCAN_PERIODIC */
+
 #else /* CONFIG_AUTOSCAN */
 
 static inline int autoscan_init(struct wpa_supplicant *wpa_s, int req_scan)