ARM: dts: msm: optimization to hx8394a's on/off sequence

Optimize hx8394a's init/uninit sequence, reduce the panel on
delay by 80ms, and reduce panel off delay by 160ms. This could
speed up display blank/unblank.

Change-Id: Ia40f17bf57319d5669f4cd58471ac23013615dc5
Signed-off-by: Ray Zhang <rayzhang@codeaurora.org>