dt-bindings: opp: opp-v2-kryo-cpu: support Qualcomm Krait SoCs

Exted the opp-v2-kryo-cpu.yaml to support defining OPP tables for the
previous generation of Qualcomm CPUs, 32-bit Krait-based platforms.

It makes no sense to use 'operating-points-v2-kryo-cpu' compatibility
node for the Krait cores. Add support for the Krait-specific
'operating-points-v2-krait-cpu' compatibility string and the relevant
opp-microvolt subclasses properties.

The listed opp-supported-hw values are applicable only to msm8996 /
msm8996pro platforms. Remove the enum as other platforms will use other
bit values. It makes little sense to list all possible values for all
the platforms here.
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>

Documentation/devicetree/bindings/opp/opp-v2-kryo-cpu.yaml

@@ -26,7 +26,9 @@ description: |
 
 properties:
   compatible:
-    const: operating-points-v2-kryo-cpu
+    enum:
+      - operating-points-v2-krait-cpu
+      - operating-points-v2-kryo-cpu
 
   nvmem-cells:
     description: |
@@ -65,14 +67,16 @@ patternProperties:
           5:  MSM8996SG, speedbin 1
           6:  MSM8996SG, speedbin 2
           7-31:  unused
-        enum: [0x1, 0x2, 0x3, 0x4, 0x5, 0x6, 0x7,
-               0x9, 0xd, 0xe, 0xf,
-               0x10, 0x20, 0x30, 0x70]
+
+          Other platforms use bits directly corresponding to speedbin index.
 
       clock-latency-ns: true
 
       required-opps: true
 
+    patternProperties:
+      '^opp-microvolt-speed[0-9]+-pvs[0-9]+$': true
+
     required:
       - opp-hz