boards: mimxrt1020_evk: Enable ADC on RT1020 EVK

Enables ADC1 on the RT1020 evaluation board. Channels 10 and 11 of this
ADC are exposed as pins 1 and 2 of J18 on the evk.

Signed-off-by: Daniel DeGrasse <daniel.degrasse@nxp.com>
6 files changed