init: populate serialno/model properties from Ventana EEPROM

populate the serialno/model ro properties from the Ventana EEPROM and
set these in /sys/class/android_usb as well for use with ADB.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
overlay: disable auto brightness by default

Ventana devices do not have an ambient light sensor so we will disable
auto-brightness adjust capability. Also remove redundant property.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
overlay: Disable Wifi Display

Disable Wifi Display by default

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
bootscript: use console and baudrate from uboot

We always have a valid console and baudrate env var setting in the Ventana
bootloader, so lets use this. This allows changing baudrates or serial console
including un-setting console which is useful for reducing boot time.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
bootscript: add ability to specify displays

In case the display detect logic does not suit your needs, you can
set the 'panel' uboot env variable to one of the supported displays:
 Hannstar-XGA
 AUO-G070VW01
 HDMI

Additionally for HDMI you can set the 'hdmi' variable to a specifcy
framebuffer display mode if the default one (1280x720M@60) isn't desireable.

Additionally we add a banner with a script version and remove some unneeded
semi-colons.

Signed-off-by: Tim Harvey <tharvey@gateworks.com>
bootscript: change default HDMI resolution to 1080p

Change the default HDMI mode from 1280x720M@60 to 1920x1280M@60
which can be specified via the 'hdmi' u-boot env variable.

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