Merge git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-linus

Merge git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-linus

* git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-linus:
  Squashfs: simplify CONFIG_SQUASHFS_LZO handling
  Squashfs: move squashfs_i() definition from squashfs.h
  Squashfs: get rid of default n in Kconfig
  Squashfs: add missing check in zlib_wrapper
  Squashfs: remove unnecessary variable in zlib_wrapper
  Squashfs: Add XZ compression configuration option
  Squashfs: add XZ compression support