ipa: raspberrypi: Rename the controller namespace from Rpi to RpiController

This avoids a namespace clash with the RPi namespace used by the ipa and
pipeline handlers, and cleans up the syntax slightly.

There are no functional changes in this commit.

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/ipa/raspberrypi/controller/histogram.hpp

@@ -13,7 +13,7 @@
 // A simple histogram class, for use in particular to find "quantiles" and
 // averages between "quantiles".
 
-namespace RPi {
+namespace RPiController {
 
 class Histogram
 {
@@ -41,4 +41,4 @@ private:
 	std::vector<uint64_t> cumulative_;
 };
 
-} // namespace RPi
+} // namespace RPiController