qcom: qnovo: Add support to enable qnovo charging

Add property qnovo_enable to enable qnovo charging. Also add
property pt_enable to enable pulse train.

Extend QNOVO algorithm's control of voltage and current after
pulse train stops and as long as qnovo_enable = 1.

The interrupt ptrain_done is configured wakeup capable.

CRs-Fixed: 2013069
Change-Id: Icb61e0e0169283f5f52a4994431489dde0af1c73
Signed-off-by: Harry Yang <harryy@codeaurora.org>