aio: Add delay after power change to Analog Comparator.

Provide 5 micro sec delay after power change to analog comparator to
get it stable. If delay is not given, we observed some instability and
it generates random interrupt.

Jira: ZEP-1438/ZEP-1927

Signed-off-by: Youvedeep Singh <youvedeep.singh@intel.com>