libcamera: Support draft controls and properties

Extend the control and property framework to support exposing draft
controls and properties in a scoped namespace.

The controls/properties themselves will retain the same ordering in the
relevant enum/id maps - but the access to any draft control will require
explicitly referencing through its' draft:: namespace prefix.

Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
[Added missing hunk in control_ids.cpp.in and changed subject]
Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>

src/libcamera/property_ids.cpp.in

@@ -23,12 +23,27 @@ namespace properties {
 
 ${controls_doc}
 
+/**
+ * \brief Namespace for libcamera draft properties
+ */
+namespace draft {
+
+${draft_controls_doc}
+
+} /* namespace draft */
+
 #ifndef __DOXYGEN__
 /*
  * Keep the properties definitions hidden from doxygen as it incorrectly parses
  * them as functions.
  */
 ${controls_def}
+
+namespace draft {
+
+${draft_controls_def}
+
+} /* namespace draft */
 #endif
 
 /**