libcamera: Replace utils::clamp() with std::clamp()

Now that libcamera uses C++17, the C++ standard library provides
std::clamp(). Drop our custom utils::clamp() function.

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

src/libcamera/pipeline/vimc/vimc.cpp

@@ -360,7 +360,7 @@ int PipelineHandlerVimc::processControls(VimcCameraData *data, Request *request)
 		}
 
 		int32_t value = lroundf(it.second.get<float>() * 128 + offset);
-		controls.set(cid, utils::clamp(value, 0, 255));
+		controls.set(cid, std::clamp(value, 0, 255));
 	}
 
 	for (const auto &ctrl : controls)