drivers: acmp: Updated driver to be compatible with nxp_rt7xx

1. Fixed the bug that DAC value was set incorrectly.
2. The MIMXRT700 does not have windowed mode and
'enableSample' controls, code added for compatibility
on this platform.

Signed-off-by: Zhaoxiang Jin <Zhaoxiang.Jin_1@nxp.com>