tests: add zephyr adc driver api test case

the commit test below adc driver api with different resolutions
and modes
    adc_enable()
    adc_read()
    adc_disable()

move original adc test to adc_simple folder

Change-Id: I016b5e67a5d89fc8d5ae76f33799e5d3eb3e1cf8
Signed-off-by: jing wang <jing.j.wang@intel.com>