tests: adc: add support of cc32xx

#define ADC_1ST_CHANNEL_ID	0

#define ADC_2ND_CHANNEL_ID	2

#elif defined(CONFIG_BOARD_CC3220SF_LAUNCHXL) || \

	defined(CONFIG_BOARD_CC3235SF_LAUNCHXL)

#define ADC_DEVICE_NAME		DT_LABEL(DT_INST(0, ti_cc32xx_adc))

#define ADC_RESOLUTION		12

#define ADC_GAIN		ADC_GAIN_1

#define ADC_REFERENCE		ADC_REF_INTERNAL

#define ADC_ACQUISITION_TIME	ADC_ACQ_TIME_DEFAULT

#define ADC_1ST_CHANNEL_ID	0

#define ADC_2ND_CHANNEL_ID      1

#else

#error "Unsupported board."

#endif