tests: drivers: adc: adc_api: enbale test for mr_canhubk3

Enable adc0 with 2 channels 22, 23 on standard group with
normal end of conversion callback. Channels correspond to
VREFL(0V), VREFH(3.3V).

Signed-off-by: Cong Nguyen Huu <cong.nguyenhuu@nxp.com>