qpnp-qnovo: prevent pulse train while esr is in progress

At the end of pulse train ESR measurement is forced. It is expected
that when ESR is being measured, which takes about 1.5 seconds, the
next pulse train does not start.

However we see that a uevent is sent to userspace and it enables pulse
train within 100mS.

To prevent that put the pulse train enabling bit under a votable
control. And make QNI_VOTER (the userspace voter) and ESR_VOTER vote
on it.

Moreover, the current pulse train enabling path checks if qnovo was
enabled, make a QNOVO_OVERALL_ENABLE voter to this new voter to reflect
it.

Change-Id: I6d2177250cc47f5aeb6591c532ee18d37e3b02c6
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>