Pull Renesas H8/300 architecture re-introduction from Yoshinori Sato.

We dropped arch/h8300 two years ago as stale and old, this is a new and
more modern rewritten arch support for the same architecture.

* tag 'for-4.2' of git://git.sourceforge.jp/gitroot/uclinux-h8/linux: (27 commits)
  h8300: fix typo.
  h8300: Always build dtb
  h8300: Remove ARCH_WANT_IPC_PARSE_VERSION
  sh-sci: Get register size from platform device
  clk: h8300: fix error handling in h8s2678_pll_clk_setup()
  h8300: Symbol name fix
  h8300: devicetree source
  h8300: configs
  h8300: IRQ chip driver
  h8300: clocksource
  h8300: clock driver
  h8300: Build scripts
  h8300: library functions
  h8300: Memory management
  h8300: miscellaneous functions
  h8300: process helpers
  h8300: compressed image support
  h8300: Low level entry
  h8300: kernel startup
  h8300: Interrupt and exceptions
  ...