[media] Amend values of enum v4l2_mpeg_vidc_video_perf_mode

Switching to 0 and 1 as part of 23ee84dd apparently caused
binary compatibility issues.

Change-Id: I8ca41c32943c56c4b00c91dbf134dbeb9697c277
Signed-off-by: Deva Ramasubramanian <dramasub@codeaurora.org>