arm64: dts: qcom: pm660: Fix missing pound sign in interrupt-cells

Also add a space after '=' while at it.
Tested-by: Konrad Dybcio <konradybcio@gmail.com>
Signed-off-by: Łukasz Patron <priv.luk@gmail.com>
Link: https://lore.kernel.org/r/20200725082417.8507-1-priv.luk@gmail.comSigned-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>

arch/arm64/boot/dts/qcom/pm660.dtsi

@@ -44,7 +44,7 @@ pm660_gpios: gpios@c000 {
 			gpio-ranges = <&pm660_gpios 0 0 13>;
 			#gpio-cells = <2>;
 			interrupt-controller;
-			interrupt-cells =<2>;
+			#interrupt-cells = <2>;
 		};
 	};
 };