uboot-phytec

MLK-11304 MX6 SabreSD: Disable HDMI detect

As the HDMI splash screen feature is not well supported,
we should not set it to be the default display. In case,
users leave the 'panel' uboot environment variable empty
and connect the board with a HDMI monitor, the HDMI detect
funtion will work and enable the HDMI splash screen. So,
this patch disables HDMI detect function so that users
may only explicitly set the 'panel' variable to be 'HDMI'
to use HDMI splash screen.

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Signed-off-by: Liu Ying <Ying.Liu@freescale.com>
Signed-off-by: Ye.Li <B37916@freescale.com>
(cherry picked from commit d482c54a9fbf458fdb2270cf990d8ec727823bb1)
(cherry picked from commit b484d36882c8db9ddb8262001cfef187a28051b2)