platform/x86: x86-android-tablets: Add support for Vexia EDU ATLA 10 tablet

platform/x86: x86-android-tablets: Add support for Vexia EDU ATLA 10 tablet

Add support for the Vexia EDU ATLA 10 tablet, Android 4.2/4.4 + Guadalinex
Ubuntu tablet distributed to schools in the Spanish Andalucía region.

Besides the usual broken DSDT issues this tablet is special because all
its LPSS island peripherals are enumerated as PCI devices rather then as
ACPI devices as they typically are.

At the same time there are disabled (_STA=0) ACPI devices for
the peripherals and child ACPI devices for e.g. attached I2C/SDIO devices
are children of these disabled ACPI devices and thus will not be used
by Linux since the parent is disabled.

So besides the usual manual i2c-client instantiation for accel/touchscreen
this tablet also requires manual i2c-client instantiation for the codec
and for the PMIC.

Also it seems the mainboard was designed for Windows not Android, so
it has an I2C attached embedded controller instead of allowing direct
access to the charger + fuel-gauge chips as is usual with Android boards.

Normally when there is an embedded controller, there also is ACPI battery
support, but since this shipped with Android that is missing and Linux
needs to have a power_supply class driver talking directly to the EC.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Andy Shevchenko <andy@kernel.org>
Link: https://lore.kernel.org/r/20241104200848.58693-4-hdegoede@redhat.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>