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.

CRs-Fixed: 2518451
Change-Id: I0400c6f2b2e0baf99bee4b4a3736bb1eab646627
Signed-off-by: Venkat Chinta <vchinta@codeaurora.org>