msm: vidc: enable pic_order_cnt_type for H264 encoding

-current implementation will result in poc_type as 0 in SPS
params (even though the poc increment value is 2 in the
encoded stream).
-So changes done to return poc_type as 2 in SPS params

Change-Id: I5a22af422b0e1591a69a0b5b868342667ee60bbf
Signed-off-by: srikarri <sridur@codeaurora.org>
msm: vidc: No need to allocate metadata by default

If metadata is not enabled by client, there is no need
to enable it by default.

Change-Id: I6d5bd1c04dcdf78549afac57bcaceb82602da270
Signed-off-by: Deepak Verma <dverma@codeaurora.org>