linux-yocto/4.12: pinctrl backports

linux-yocto/4.12: pinctrl backports

Backporting the following pinctrl commits to enable controllers on
Intel Cannon Lake:

  4b7a5c1b4ec5 pinctrl: intel: Add Intel Cannon Lake PCH-H pin controller support
  044631ce1937 pinctrl: intel: Add Intel Cannon Lake PCH pin controller support
  2054b0ea59a7 pinctrl: intel: Make it possible to specify mode per pin in a group
  55b9053b5a5a pinctrl: intel: Add support for variable size pad groups

(From OE-Core rev: 4c05eb243c2cf10304383f6265721b695750cb9b)

Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>