pinctrl: Add pmi8994 gpio bindings

Update the binding doc for qcom pmi8994-gpio devices.
Signed-off-by: Vivek Gautam <vivek.gautam@codeaurora.org>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Documentation/devicetree/bindings/pinctrl/qcom,pmic-gpio.txt

@@ -16,6 +16,7 @@ PMIC's from Qualcomm.
 		    "qcom,pm8941-gpio"
 		    "qcom,pm8994-gpio"
 		    "qcom,pma8084-gpio"
+		    "qcom,pmi8994-gpio"
 
 		    And must contain either "qcom,spmi-gpio" or "qcom,ssbi-gpio"
 		    if the device is on an spmi bus or an ssbi bus respectively
@@ -85,6 +86,7 @@ to specify in a pin configuration subnode:
 		    gpio1-gpio36 for pm8941
 		    gpio1-gpio22 for pm8994
 		    gpio1-gpio22 for pma8084
+		    gpio1-gpio10 for pmi8994
 
 - function:
 	Usage: required