compositor: Enable HDCP for an output using weston.ini

This patch enables a user to opt for HDCP per output, by writing into
the output section of weston.ini configuration file. HDCP is always
enabled by default for the outputs.

Signed-off-by: Ankit Nautiyal <ankit.k.nautiyal@intel.com>

include/libweston/libweston.h

@@ -299,6 +299,7 @@ struct weston_output {
 
 	enum weston_hdcp_protection desired_protection;
 	enum weston_hdcp_protection current_protection;
+	bool allow_protection;
 
 	void (*start_repaint_loop)(struct weston_output *output);
 	int (*repaint)(struct weston_output *output,
@@ -2458,6 +2459,10 @@ weston_head_from_resource(struct wl_resource *resource);
 struct weston_head *
 weston_output_get_first_head(struct weston_output *output);
 
+void
+weston_output_allow_protection(struct weston_output *output,
+			       bool allow_protection);
+
 int
 weston_compositor_enable_touch_calibrator(struct weston_compositor *compositor,
 				weston_touch_calibration_save_func save);