tests: drivers: build_all: adc: add build test for the mcp320x driver

Add build-only test of the mcp320x ADC driver.

Signed-off-by: Henrik Brix Andersen <[email protected]>

Author: henrikbrixandersen

tests/drivers/build_all/adc/testcase.yaml

@@ -20,6 +20,9 @@ tests:
     platform_allow: frdm_k22f
   drivers.adc.mcux.lpadc.build:
     platform_allow: lpcxpresso55s28
+  drivers.adc.mcp320x.build:
+    platform_allow: lpcxpresso55s16
+    extra_args: SHIELD=mikroe_adc_click
   drivers.adc.npcx.build:
     platform_allow: npcx7m6fb_evb
   drivers.adc.nrf.build: