dt-bindings: input: pm8941-pwrkey: add pmk8350 compatible strings

Add power key and resin compatible strings for the PMK8350 PMIC.
These are needed to distinguish key PON_HLOS register differences
between PMK8350 and previous PMIC PON modules.
Signed-off-by: David Collins <collinsd@codeaurora.org>
Signed-off-by: satya priya <skakit@codeaurora.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/1620630064-16354-3-git-send-email-skakit@codeaurora.orgSigned-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>

Documentation/devicetree/bindings/input/qcom,pm8941-pwrkey.txt

@@ -8,6 +8,8 @@ PROPERTIES
 	Definition: must be one of:
 		    "qcom,pm8941-pwrkey"
 		    "qcom,pm8941-resin"
+		    "qcom,pmk8350-pwrkey"
+		    "qcom,pmk8350-resin"
 
 - reg:
 	Usage: required