clk: qcom: Add APQ8084 Global Clock Controller documentation

Add the compatible string for the APQ8084 global clock controller
to the clock binding documentation.
Signed-off-by: NGeorgi Djakov <gdjakov@mm-sol.com>
Reviewed-by: NStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>

Documentation/devicetree/bindings/clock/qcom,gcc.txt

@@ -5,6 +5,7 @@ Required properties :
 - compatible : shall contain only one of the following:
 
 			"qcom,gcc-apq8064"
+			"qcom,gcc-apq8084"
 			"qcom,gcc-msm8660"
 			"qcom,gcc-msm8960"
 			"qcom,gcc-msm8974"