pinctrl: zynqmp: drop excess struct member description

The 'node' member has never been part of this structure so drop its
description.

Fixes: 8b242ca7 ("pinctrl: Add Xilinx ZynqMP pinctrl driver support")
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Link: https://lore.kernel.org/20241010080432.7781-1-brgl@bgdev.pl


Signed-off-by: Linus Walleij <linus.walleij@linaro.org>