msm: camera: core: Change return type

Return different error number when new requests and update
packets are rejected due to bad request id. This allows
userspace to differentiate this specific reason for failure.

Change-Id: I0b1e7086351b9438fd72a6d824bc20c8213b5ea8
Signed-off-by: Ayush Kumar <ayushkr@codeaurora.org>