ARM: ux500: add STM pin configuration

This patch add the new stm pinctrl states
definitions for the Ux500 MOP500 series.

Signed-off-by: Jean-Nicolas Graux <jean-nicolas.graux@stericsson.com>
Reviewed-by: Philippe Langlais <philippe.langlais@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>