amadeus: Add missing compressor effect from REV11 (#4010)

* amadeus: Add missing compressor effect from REV11

This was in my reversing notes but seems I completely forgot to
implement it

Also took the opportunity to simplify the Limiter effect a bit.

* Remove some outdated comment

* Address gdkchan's comments

Ryujinx.Audio/Renderer/Server/BehaviourContext.cs

@@ -44,7 +44,7 @@ namespace Ryujinx.Audio.Renderer.Server
         /// <see cref="Parameter.RendererInfoOutStatus"/> was added to supply the count of update done sent to the DSP.
         /// A new version of the command estimator was added to address timing changes caused by the voice changes.
         /// Additionally, the rendering limit percent was incremented to 80%.
-        /// 
+        ///
         /// </summary>
         /// <remarks>This was added in system update 6.0.0</remarks>
         public const int Revision5 = 5 << 24;
@@ -93,6 +93,7 @@ namespace Ryujinx.Audio.Renderer.Server
         /// <summary>
         /// REV11:
         /// The "legacy" effects (Delay, Reverb and Reverb 3D) were updated to match the standard channel mapping used by the audio renderer.
+        /// A new effect was added: Compressor. This effect is effectively implemented with a DRC.
         /// A new version of the command estimator was added to address timing changes caused by the legacy effects changes.
         /// A voice drop parameter was added in 15.0.0: This allows an application to amplify or attenuate the estimated time of DSP commands.
         /// </summary>