libcamera: v4l2_controls: Use the ControlRange class for control info

Use the ControlRange class to express the range of a V4L2 control,
replacing the open-coded minimum and maximum fields in the
V4L2ControlInfo class.

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

src/libcamera/include/v4l2_controls.h

@@ -30,8 +30,7 @@ public:
 	size_t size() const { return size_; }
 	const std::string &name() const { return name_; }
 
-	int64_t min() const { return min_; }
-	int64_t max() const { return max_; }
+	const ControlRange &range() const { return range_; }
 
 private:
 	unsigned int id_;
@@ -39,8 +38,7 @@ private:
 	size_t size_;
 	std::string name_;
 
-	int64_t min_;
-	int64_t max_;
+	ControlRange range_;
 };
 
 using V4L2ControlInfoMap = std::map<unsigned int, V4L2ControlInfo>;