msm: vidc: change macro definition for session_cmd's

update macro defnition for all session_cmd's, and simplify
the response returned during release_resource_done.

Change-Id: If4bc92a147233eca4efcbf3d81c6317f9425fccb
Signed-off-by: Ashray Kulkarni <ashrayk@codeaurora.org>