mpu401: Add MPU-401AT I/O address ranges

src/sound/snd_mpu401.c

@@ -1844,6 +1844,18 @@ static const device_config_t mpu401_standalone_config[] = {
                 .description = "0x330",
                 .value = 0x330
             },
+            {
+                .description = "0x332",
+                .value = 0x332
+            },
+            {
+                .description = "0x334",
+                .value = 0x334
+            },
+            {
+                .description = "0x336",
+                .value = 0x336
+            },
             {
                 .description = "0x340",
                 .value = 0x340