linux-yocto/4.1: pinctrl backports

linux-yocto/4.1: pinctrl backports

Integrating the following mainline commits:

  pinctrl: make pinctrl_register() return proper error code
  pinctrl: Remove .owner field
  pinctrl: mediatek: add pinctrl/GPIO/EINT driver for mt8127
  pinctrl: mediatek: Add Pinctrl/GPIO driver for mt6397.
  pinctrl: add imx7d support
  pinctrl: sirf: add sirf atlas7 pinctrl and gpio support
  pinctrl: Add Pistachio SoC pin control driver
  pinctrl: lpc18xx: add the missing group function map
  pinctrl: lpc18xx: create pin cap lookup helper
  pinctrl: add lpc18xx pinctrl driver

Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>