msm: camera: reqmgr: Also check the idx if the rd slot has applied

- Also check the idx if the rd slot is applied, since the status
is APPLIED before sync link process next frame, there is a big
chance that sync link rd slot is APPLIED if current link is processing
the frame, then CRM won't do the idx checking if we don't check
APPLIED status.

CRs-Fixed: 2615873
Change-Id: I8fa6f004cec536afcfee5774617165bd0480064d
Signed-off-by: Depeng Shao <depengs@codeaurora.org>