Fix direct keyboard not working when connected with a controller

- Pass KeyboardDriver to NpadController.GetHLEKeyboardInput().
- Always fetch all keyboards if Direct Keyboard is turned on.
- Remove unnecessary return null.

src/Ryujinx.Input/HLE/NpadController.cs

@@ -487,10 +487,10 @@ namespace Ryujinx.Input.HLE
             return value;
         }
 
-        public KeyboardInput? GetHLEKeyboardInput()
+        public KeyboardInput? GetHLEKeyboardInput(IGamepadDriver KeyboardDriver)
-        {
-            if (_gamepad is IKeyboard keyboard)
         {
+            var keyboard = KeyboardDriver.GetGamepad("0") as IKeyboard;
+
             KeyboardStateSnapshot keyboardState = keyboard.GetKeyboardStateSnapshot();
 
             KeyboardInput hidKeyboard = new()
@@ -514,9 +514,7 @@ namespace Ryujinx.Input.HLE
             }
 
             return hidKeyboard;
-            }
 
-            return null;
         }
 
 

src/Ryujinx.Input/HLE/NpadManager.cs

@@ -234,7 +234,7 @@ namespace Ryujinx.Input.HLE
 
                         if (_enableKeyboard)
                         {
-                            hleKeyboardInput = controller.GetHLEKeyboardInput();
+                            hleKeyboardInput = controller.GetHLEKeyboardInput(_keyboardDriver);
                         }
                     }
                     else