libcamera: V4L2Device: Use Span in updateControls()

V4L2Device::updateControls() takes two arguments, raw array and
its size, for the v4l2_ext_control values. This replaces it with
libcamera::Span.

Signed-off-by: Hirokazu Honda <hiroh@chromium.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Jacopo Mondi <jacopo@jmondi.org>

include/libcamera/internal/v4l2_device.h

@@ -14,6 +14,7 @@
 #include <linux/videodev2.h>
 
 #include <libcamera/signal.h>
+#include <libcamera/span.h>
 
 #include "libcamera/internal/log.h"
 #include "libcamera/internal/v4l2_controls.h"
@@ -55,8 +56,7 @@ protected:
 private:
 	void listControls();
 	void updateControls(ControlList *ctrls,
-			    const struct v4l2_ext_control *v4l2Ctrls,
-			    unsigned int count);
+			    Span<const v4l2_ext_control> v4l2Ctrls);
 
 	void eventAvailable(EventNotifier *notifier);