dt-bindings: qcom: Add msm899(2/4) bindings

Acked-by: NRob Herring <robh@kernel.org>
Signed-off-by: NJeremy McNicoll <jeremymc@redhat.com>
Signed-off-by: NAndy Gross <andy.gross@linaro.org>

Documentation/devicetree/bindings/arm/qcom.txt

@@ -21,6 +21,8 @@ The 'SoC' element must be one of the following strings:
 	apq8096
 	msm8916
 	msm8974
+	msm8992
+	msm8994
 	msm8996
 
 The 'board' element must be one of the following strings: