[KERNEL][VFS] Change vfs_mount() prototype to be the same as userland one
[KERNEL][VFS] Add vfs ops definition of MOUNT, LOOKUP, MKDIR and MKNOD
[USERLAND][LIBC] Add vfs ops definition of MOUNT, LOOKUP, MKDIR and MKNOD
[KERNEL][VFS] Add special root_mount request structure
[USERLAND][LIBC] Add special root_mount structure
[KERNEL][VFS] Add remount "/" implementation on vfs_mount()
[USERLAND][LIBFIU] Start implementation of libfiu
[USERLAND][DRV] Ext2 now uses libfiu