msm: camera: reqmgr: Improve master slave sync

If link is not ready on master epoch, but it becomes ready on slave
epoch, then master skips apply and slave applies request and goes ahead
of master.
Fix this by skipping apply on slave if master slot in not in applied
state.

CRs-Fixed: 2562008
Change-Id: Ic612eedfeedf2a6ea50737a49a6f1f31a5de1dc2
Signed-off-by: Trishansh Bhardwaj <tbhardwa@codeaurora.org>