msm: vidc: Translate v4l2 perf modes to hal perf values

V4L2 perf mode values were not mapped correctly to hal
perf values. So video perf mode control setting from video
driver client would always fail. This patch ensures the
mapping is done correctly.

Change-Id: I52144792e8c06e30727c6b211edfec3243715d61
Signed-off-by: Arun Menon <avmenon@codeaurora.org>