ipa: raspberrypi: Change to C style code comments

As part of the on-going refactor efforts for the source files in
src/ipa/raspberrypi/, switch all C++ style comments to C style comments.

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

src/ipa/raspberrypi/controller/rpi/sharpen.hpp

@@ -9,7 +9,7 @@
 #include "../sharpen_algorithm.hpp"
 #include "../sharpen_status.h"
 
-// This is our implementation of the "sharpen algorithm".
+/* This is our implementation of the "sharpen algorithm". */
 
 namespace RPiController {
 
@@ -31,4 +31,4 @@ private:
 	double userStrength_;
 };
 
-} // namespace RPiController
+} /* namespace RPiController */