ARM: dts: msm: Enable continuous splash for msm8226 CDP, MTP and QRD

Enable continuous splash screen feature for msm8226 video mode panel
which keeps the display enabled during the transition from bootloader
to kernel.

Change-Id: I03f48c08c0d060483817cff1486c3c666fdf0d52
Signed-off-by: Ray Zhang <rayzhang@codeaurora.org>