msm: vidc: don't skip set ctrl for the same value

By default, v4l2 driver will skip set ctrl if the same
value is set again.
Add EXECUTE_ON_WRITE flag for all ctrls to make sure
set ctrl is not skipped even when value is unchanged.

Change-Id: I67542d648c412e4e87d82cfa9de47f679ab3a860
Signed-off-by: Qiwei Liu <qiweil@codeaurora.org>