pinctrl: qcom: spmi-gpio: select IRQ_DOMAIN_HIERARCHY in Kconfig

Select IRQ_DOMAIN_HIERARCHY for spmi-gpio in Kconfig since this driver
is now setup as a hierarchical IRQ chip.

Signed-off-by: Brian Masney <masneyb@onstation.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>