power: qpnp-smbcharger: Handle USB removal during pulsing

Handle removal of USB during QC 3.0 pulsing operation.
While at it, cancel hvdcp detection work before updating input
status to USB driver on charger removal.

CRs-Fixed: 1011956
Change-Id: I28cf37e60746eab126e7cd6822de9b35b8f832bf
Signed-off-by: Anirudh Ghayal <aghayal@codeaurora.org>