pinctrl: Make of_device_id array const

Make of_device_id array const, because all OF functions handle it as
const.

Signed-off-by: Kiran Padwal <kiran.padwal21@gmail.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

diff --cc drivers/pinctrl/pinctrl-imx23.c
Simple merge

diff --cc drivers/pinctrl/pinctrl-imx25.c
Simple merge

diff --cc drivers/pinctrl/pinctrl-imx27.c
Simple merge

diff --cc drivers/pinctrl/pinctrl-imx28.c
Simple merge

diff --cc drivers/pinctrl/pinctrl-imx35.c
Simple merge

diff --cc drivers/pinctrl/pinctrl-imx50.c
Simple merge

diff --cc drivers/pinctrl/pinctrl-imx51.c
Simple merge

diff --cc drivers/pinctrl/pinctrl-imx53.c
Simple merge

diff --cc drivers/pinctrl/pinctrl-imx6dl.c
Simple merge

diff --cc drivers/pinctrl/pinctrl-imx6q.c
Simple merge

diff --cc drivers/pinctrl/pinctrl-imx6sl.c
Simple merge

diff --cc drivers/pinctrl/pinctrl-imx6sx.c
Simple merge

diff --cc drivers/pinctrl/pinctrl-tegra114.c
Simple merge

diff --cc drivers/pinctrl/pinctrl-tegra124.c
Simple merge

diff --cc drivers/pinctrl/pinctrl-tegra20.c
Simple merge

diff --cc drivers/pinctrl/pinctrl-tegra30.c
Simple merge

diff --cc drivers/pinctrl/spear/pinctrl-spear1310.c
Simple merge

diff --cc drivers/pinctrl/spear/pinctrl-spear1340.c
Simple merge

diff --cc drivers/pinctrl/spear/pinctrl-spear300.c
Simple merge

diff --cc drivers/pinctrl/spear/pinctrl-spear310.c
Simple merge

diff --cc drivers/pinctrl/spear/pinctrl-spear320.c
Simple merge