[COMMON] fimc-is2: Skip flushing for hw frames from different instance

[COMMON] fimc-is2: Skip flushing for hw frames from different instance

H/W framemgr could have the multiple frames from different instance.
Currently, H/W frame can be flushed by checking old frame count, only,
and it could flush the other frame that doesn't mean to.
So, it is required to check the instnace number in frame to flush them.

PR JIRA ID: CPR-291

CRs-fixed: (CR)

Change-Id: I48a1b5b5cb579b1ea4299a896f2910c8d0eb24b6
Signed-off-by: Sanghoon Lee <shoon114.lee@samsung.com>
Reviewed-on: https://gerrit.mot.com/1332441
SME-Granted: SME Approvals Granted
SLTApproved: Slta Waiver
Tested-by: Jira Key
Reviewed-by: Dawei Wang <wangdw10@motorola.com>
Reviewed-by: Xiangpo Zhao <zhaoxp3@motorola.com>
Submit-Approved: Jira Key