battery: don't wait for aicl rerun

In the callback to change the usb icl, the current code waits to
rerun AICL. These waits were to ensure that AICL completes and we
can restore parallel charger once done.

However, these waits are unnecessary since we invoke code to
enable USBIN_I_VOTER for parallel charger in a workqueue. Moreover,
these wait causes compliance failures. Remove those waits.

Change-Id: Id2e3ca87e111aa415c47683a2cc365a9bece7ffb
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>