Documentation: Document pm660(l) SPMI GPIOs compatible

Signed-off-by: Konrad Dybcio <konradybcio@gmail.com>
Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://lore.kernel.org/r/20200622192558.152828-3-konradybcio@gmail.comSigned-off-by: Linus Walleij <linus.walleij@linaro.org>

Documentation/devicetree/bindings/pinctrl/qcom,pmic-gpio.txt

@@ -23,6 +23,8 @@ PMIC's from Qualcomm.
 		    "qcom,pmi8994-gpio"
 		    "qcom,pmi8998-gpio"
 		    "qcom,pms405-gpio"
+		    "qcom,pm660-gpio"
+		    "qcom,pm660l-gpio"
 		    "qcom,pm8150-gpio"
 		    "qcom,pm8150b-gpio"
 		    "qcom,pm6150-gpio"