tests: lib: devictree: api_ext: Add ADC_DT_SPEC_GET_BY_IDX cases

Add tests for the ADC_DT_SPEC_GET_BY_IDX and ADC_DT_SPEC_INST_GET_BY_IDX
macros.

Signed-off-by: Pieter De Gendt <pieter.degendt@basalte.be>
1 file changed