pinctrl: amd: Add missing pins to the pin group list

Some of the pins were not exposed in the initial driver or kept as
reserved. Exposing all of them now.

Signed-off-by: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
Link: https://lore.kernel.org/r/20201007111220.744348-1-Shyam-sundar.S-k@amd.com


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