staging: rtl8712: Replace r8712_free_evt_priv()

Remove function r8712_free_evt_priv as all it does is call
_free_evt_priv.
Rename _free_evt_priv to r8712_free_evt_priv to maintain compatibility
with call sites.
Change type of new r8712_free_evt_priv from static to non-static to
match old definition.
Signed-off-by: Nishka Dasgupta <nishkadg.linux@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/rtl8712/rtl871x_cmd.c

@@ -87,7 +87,7 @@ int r8712_init_evt_priv(struct evt_priv *pevtpriv)
 	return 0;
 }
 
-static void _free_evt_priv(struct evt_priv *pevtpriv)
+void r8712_free_evt_priv(struct evt_priv *pevtpriv)
 {
 	kfree(pevtpriv->evt_allocated_buf);
 }
@@ -135,11 +135,6 @@ static struct cmd_obj *_dequeue_cmd(struct  __queue *queue)
 	return obj;
 }
 
-void r8712_free_evt_priv(struct evt_priv *pevtpriv)
-{
-	_free_evt_priv(pevtpriv);
-}
-
 void r8712_enqueue_cmd(struct cmd_priv *pcmdpriv, struct cmd_obj *obj)
 {
 	if (pcmdpriv->padapter->eeprompriv.bautoload_fail_flag)