ESP32: Add Esp32c2 cdc usb serial variant

Signed-off-by: Peter M <petermm@gmail.com>

Author: petermm

.github/workflows/esp32-mkimage.yaml

@@ -121,7 +121,7 @@ jobs:
         make
 
     - name: "Set SOC target"
-      run: echo "SOC_TARGET=${{ startsWith(matrix.soc, 'esp32p4') && 'esp32p4' || matrix.soc }}" >> $GITHUB_ENV
+      run: echo "SOC_TARGET=${{ startsWith(matrix.soc, 'esp32p4') && 'esp32p4' || startsWith(matrix.soc, 'esp32c2') && 'esp32c2' || matrix.soc }}" >> $GITHUB_ENV
 
     - name: "Use release defaults"
       if: startsWith(github.ref, 'refs/tags/')
@@ -137,6 +137,13 @@ jobs:
       run: |
         cp sdkconfig.defaults.${{ matrix.soc }} sdkconfig.defaults.esp32p4
 
+    - name: "Enable USB serial for esp32c2_cdc"
+      if: matrix.soc == 'esp32c2_cdc'
+      shell: bash
+      working-directory: ./src/platforms/esp32/
+      run: |
+        echo "CONFIG_USE_USB_SERIAL=y" >> sdkconfig.defaults
+
     - name: "Handle esp32p4 c6 variants - add wifi_remote component"
       if: matrix.soc == 'esp32p4_c6' || matrix.soc == 'esp32p4_pre_c6'
       shell: bash