pinctrl: qcom: spmi-gpio: Add support for qcom,gpios-disallowed property

Add support for qcom,gpios-disallowed property which is used to exclude
PMIC GPIOs not owned by the APSS processor from the pinctrl device.

CRs-Fixed: 2020939
Change-Id: Iee98837f1008fc97f6df9bfa8b54a39be8469a96
Signed-off-by: Fenglin Wu <fenglinw@codeaurora.org>