msm_fb: display: remove video_vsync message log

replace pr_info with pr_debug to prevent video_sync log
flooding kernel log.

Change-Id: I6db2af9978c990f87c9b53a0edea5275f3c6da3d
Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
Merge of Sony Release 9.1.A.0.489

Change-Id: Ieca3a0792cea463841deef8ec26566514e8c7ab1
cyanogen defconfig

Change-Id: Ia6eb24cd0d4e4a94212430f44f86411b90158939