FROMGIT: dt-bindings: firmware: Support SCMI pinctrl protocol

Add SCMI v3.2 pinctrl protocol bindings with an example.

Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Reviewed-by: Dhruva Gole <d-gole@ti.com>
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/20240418-pinctrl-scmi-v11-2-499dca9864a7@nxp.com


Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

Bug: 339841691
(cherry picked from commit 1b403075
https://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux.git

 for-linux-next)
Change-Id: I7aa06aea78424e38895fba95d19c8003e2245534
Signed-off-by: Zhipeng Wang <zhipeng.wang_1@nxp.com>