arm64: dts: qcom: pm660: Add reboot mode support

It turns out that the pm660 PON is a GEN2 device.  Update the compatible
to "qcom,pm8998-pon" and add reboot mode support, so that devices can be
rebooted into bootloader and recovery mode.  Tested on Xiaomi Redmi Note
7 phone.

While at it, drop the unnecessary newline between 'compatible' and 'reg'
property.
Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@somainline.org>
Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20210824021918.17271-1-shawn.guo@linaro.org

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

@@ -49,9 +49,10 @@ rtc@6000 {
 		};
 
 		pon: pon@800 {
-			compatible = "qcom,pm8916-pon";
-
+			compatible = "qcom,pm8998-pon";
 			reg = <0x800>;
+			mode-bootloader = <0x2>;
+			mode-recovery = <0x1>;
 
 			pwrkey {
 				compatible = "qcom,pm8941-pwrkey";