[KERNEL][VFS] Move vfs_lseek() to kernel/core/vfs/ops/
[KERNEL][VFS] Correct warning on lseek()
[KERNEL][VFS] Add new open() protocol
[KERNEL][VFS] Add device_close()
[KERNEL][VFS] Add new vfs_close() implementation
[USERLAND][LIBDRIVER/DRV] Update userland to support new close()