msm: camera: req_mgr: Reduce maximum attempts to apply request

This change reduces the maximum attempts to apply a particular
request from three to two. After two failed attempts to apply
to ISP device, IRQs for ISP device will be overlapped from
two requests. Thereafter apply request at every alternate
frame will fail without a chance of recovery. Therefore we
must notify userspace to trigger recover on the link.

CRs-Fixed: 2606911
Change-Id: I526bb837a496fe1e67786b854c5afb062dddb918
Signed-off-by: Venkat Chinta <vchinta@codeaurora.org>