msm: vidc: Remove the redudant s_parm fucntion

s_parm is duplicated in both encoder and decoder files. The
functionality is same for both encoder and decode. Hence
remove the redundancy and move to common file.

Change-Id: I170b8b4cbe8034ff3e084e8e365e5813edca8614
Signed-off-by: Praneeth Paladugu <ppaladug@codeaurora.org>