dt-bindings: mfd: pm8008: Add gpio-ranges and spmi-gpio compatible

Add gpio-ranges and "qcom,spmi-gpio" compatible to match with the
parent qcom,pmic-gpio.yaml binding.

Signed-off-by: satya priya <skakit@codeaurora.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Guru Das Srinagesh <gurus@codeaurora.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>