power: qpnp-smbcharger: register aicl_done for rising edge only

The AICL done interrupt rises when an valid AICL measurement or collapse
occurs, and falls when a new AICL measurement starts. The software is
only interested in when a valid AICL measurement becomes available.
Disable the falling edge case for this interrupt since it just becomes
more noise for the driver.

CRs-Fixed: 920791
Change-Id: Idf8471dfe4bba731480a09e43af8d791a71a122e
Signed-off-by: Xiaozhe Shi <xiaozhes@codeaurora.org>