[AUDIO-BRINGUP]

- Fix several bugs in SwDispatchPnp routine
- Routine did not complete requests, when KsServiceBusEnumPnpRequest successfully handled the request
- Software bus driver did not handle resource lists irps
- Software bus driver did not support querying pnp device state
- Software bus driver leaked the irp for IOCTL_SWENUM_GET_BUS_ID requests in SwDispatchDeviceControl
- Software bus driver is now successfully initializes in XP and audio devices are present

svn path=/branches/audio-bringup/; revision=50035