msm: camera: reqmgr: reset the slot on buf_done

Reset the slot with the valid request on receiving
the buf_done which is reported on next EPOCH.
In case of back to back irqs slot is marked as skip idx
it will apply the request and try to reset a slot based
on MAX_PD + 1 calculation which might have the request
for which we have got a bubble. To make sure this does not
happen, reset a slot only on the buf_done for valid request.

If STOP ioctl is called from UMD for ISP, it will flush all
the lists. But this is not notified to CRM which might have
a stale entry of the half applied request, so on STOP ioctl
clear all the slots.

In case of SAT mode if one of the link has generated bubble,
while the sync_link has the sync_request slot reset sync_link
will not let the link recover of the bubble. To make sure the
recovery sync_mode is set to 0 for two consecutive slots of
the link.

CRs-Fixed: 2551701
Change-Id: If4b6f8a4a831ffddcef2cae6292d066778c18b04
Signed-off-by: Tejas Prajapati <tpraja@codeaurora.org>