Added support for new Raspberry Pi 4 board revision b03115 (#1808)

Co-authored-by: Christian Mönius <[email protected]>

Author: Mr-Bart-Simpson

src/System.Device.Gpio/System/Device/Gpio/RaspberryBoardInfo.cs

@@ -163,7 +163,7 @@ public Model BoardModel
             0x20D3 => Model.RaspberryPi3BPlus,
             0x20E0 => Model.RaspberryPi3APlus,
             0x20A0 or 0x2100 => Model.RaspberryPiComputeModule3,
-            0x3111 or 0x3112 or 0x3114 => Model.RaspberryPi4,
+            0x3111 or 0x3112 or 0x3114 or 0x3115 => Model.RaspberryPi4,
             0x3140 => Model.RaspberryPiComputeModule4,
             0x3130 => Model.RaspberryPi400,
             _ => Model.Unknown,