dt-bindings: cpufreq: cpufreq-qcom-hw: Allow just 1 frequency domain

Some SoCs implementing CPUFREQ-HW only have a single frequency domain.
Allow such case.
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

Documentation/devicetree/bindings/cpufreq/cpufreq-qcom-hw.yaml

@@ -37,14 +37,14 @@ properties:
           - const: qcom,cpufreq-epss
 
   reg:
-    minItems: 2
+    minItems: 1
     items:
       - description: Frequency domain 0 register region
       - description: Frequency domain 1 register region
       - description: Frequency domain 2 register region
 
   reg-names:
-    minItems: 2
+    minItems: 1
     items:
       - const: freq-domain0
       - const: freq-domain1