pinctrl: remove bindings for pinconf options needing more thought

Some options currently take arguments in unspecified driver-specific units.
As pointed out by Stephen Warren, driver specific values should not be part
of generic devicetree bindings describing the hardware.

Therefore remove the critical bindings again, before they become part of
an official release.

Change-Id: Ic444b53985e5687e72372e53edc227b05fba79b9
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Git-commit: 5b81d55c4ccf23b9de398f819571dfc8941c7b04
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: Kaushal Kumar <kaushalk@codeaurora.org>