CMSIS-NN: Add dilation support for generic depthwise conv (#1384)

* CMSIS-NN: Add dilation support for generic depthwise conv

Change-Id: I5731a3de681c7618e6d4408d117748bb5f384ae8

* CMSIS-NN: Also call wrapper in depthwise dilation unit test
diff --git a/ARM.CMSIS.pdsc b/ARM.CMSIS.pdsc
index 8f88f40..b6692de 100644
--- a/ARM.CMSIS.pdsc
+++ b/ARM.CMSIS.pdsc
@@ -14,7 +14,8 @@
       CMSIS-NN: 3.1.0 (see revision history for details)
        - Support for int16 convolution and fully connected for reference implementation
        - Support for DSP extension optimization for int16 convolution and fully connected
-       - Support for dilation for int8 convolution
+       - Support dilation for int8 convolution
+       - Support dilation for int8 depthwise convolution
       CMSIS-RTOS2:
         - RTX 5.5.4 (see revision history for details)
     </release>