ventana: bump kernel to latest Gateworks kernel

See https://github.com/Gateworks/linux-imx6/commits/gateworks_3.0.35_4.0.0
for details

Issues resolved:
 - fixed video output where source resolution matches output resolution
 - fixed dual-display of HDMI+CVBS

Signed-off-by: Tim Harvey <tharvey@gateworks.com>