Add brcmfmac platform device pinctrl state support. That is useful
for dynamically configurate pin group for different wlan chips.
Reviewed-by: Richard Zhu <hongxing.zhu@nxp.com>
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
(cherry picked from commit 88f2834cd5b8cb8864af68d265b5bdee3000c4bf)