ARM: dts: qcom: pmx65: use node name "gpio" for spmi-gpio

All other usages of qcom,spmi-gpio use the gpio@ node name, and this is
also validated by the dt binding check. Fix it.

Signed-off-by: Luca Weiss <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Reviewed-by: Neil Armstrong <[e-mail]>
Signed-off-by: Bjorn Andersson <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

arch/arm/boot/dts/qcom-pmx65.dtsi

···
 			#thermal-sensor-cells = <0>;
 		};
 
-		pmx65_gpios: pinctrl@8800 {
+		pmx65_gpios: gpio@8800 {
 			compatible = "qcom,pmx65-gpio", "qcom,spmi-gpio";
 			reg = <0x8800>;
 			gpio-controller;