[WIN32K]
 - Fix allocation of DRIVEROBJ objects

git-svn-id: svn://svn.reactos.org/reactos/trunk/reactos@61873 97493ccd-5924-5043-b1f5-66cb403b36ce
[NTOSKRNL]
- Implement FsRtlRegisterFileSystemFilterCallbacks
- Fix returned ResultLength value in NtQuerySystemInformation
- Create \FileSystems\Filters folder in IopCreateRootDirectories, used by Windows fltmgr

git-svn-id: svn://svn.reactos.org/reactos/trunk/reactos@61874 97493ccd-5924-5043-b1f5-66cb403b36ce