pinctrl: stm32: Add STM32MP135 SoC support

STM32MP135 SoC embeds 9 GPIO banks of 16 gpios each. Those GPIO
banks contain same features as STM32MP157 GPIO banks except that
each GPIO line of the STM32MP135 can be secured.

Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Link: https://lore.kernel.org/r/20210723132810.25728-3-alexandre.torgue@foss.st.com


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