nl80211: Register read_sta_data() handler for station only builds

This driver_op can now be used in station mode, too, to fetch
information about the connection with the AP, so allow this to be used
even if wpa_supplicant is built without AP mode support.

Change-Id: Ibef1d27ed0e2df312e715a88d500500c661860d1
Signed-hostap: Jouni Malinen <j@w1.fi>
diff --git a/src/drivers/driver.h b/src/drivers/driver.h
index e392072..e9f926f 100644
--- a/src/drivers/driver.h
+++ b/src/drivers/driver.h
@@ -1638,7 +1638,7 @@
 	int (*set_generic_elem)(void *priv, const u8 *elem, size_t elem_len);
 
 	/**
-	 * read_sta_data - Fetch station data (AP only)
+	 * read_sta_data - Fetch station data
 	 * @priv: Private driver interface data
 	 * @data: Buffer for returning station information
 	 * @addr: MAC address of the station