dt-bindings: pinctrl: fix qcom-pmic-gpio for pms405

Rather than gpio1-gpio11 for pms405, there are 12 GPIOs for pms405.
But gpio1, gpio9 and gpio10 are not available.  Fix the bindings doc
to make it correct for pms405.

Fixes: ed80f6eb ("dt-bindings: pinctrl: qcom-pmic-gpio: Add pms405 support")
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>