ARM: dts: qcom-mdm9615: add gpio-ranges to mpps node, fix its name

Rename mpp node to mpps@50 (instead of mpp@50). Also add gpio-ranges
property to mpps device tree nodes, adding the mapping between pinctrl
and GPIO pins.
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20211008012524.481877-9-dmitry.baryshkov@linaro.org

arch/arm/boot/dts/qcom-mdm9615.dtsi

@@ -300,7 +300,7 @@ pwrkey@1c {
 					pull-up;
 				};
 
-				pmicmpp: mpp@50 {
+				pmicmpp: mpps@50 {
 					compatible = "qcom,pm8018-mpp", "qcom,ssbi-mpp";
 					interrupt-parent = <&pmicintc>;
 					interrupts = <24 IRQ_TYPE_NONE>,
@@ -312,6 +312,7 @@ pmicmpp: mpp@50 {
 					reg = <0x50>;
 					gpio-controller;
 					#gpio-cells = <2>;
+					gpio-ranges = <&pmicmpp 0 0 6>;
 				};
 
 				rtc@11d {