libcamera: Make geometry.h a public header

Make the geometry header public so it can be used by the API facing
applications.

Signed-off-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

src/libcamera/v4l2_subdevice.cpp

@@ -14,7 +14,8 @@
 
 #include <linux/v4l2-subdev.h>
 
-#include "geometry.h"
+#include <libcamera/geometry.h>
+
 #include "log.h"
 #include "media_device.h"
 #include "media_object.h"