lenovo/h8: Support tablet events

_QXX numbers are determined experimentally, hotkey scancodes from thinkpad-acpi
module.

Change-Id: I1f7548ef62529ae25dcdcbed0fc74390b7529a2e
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/6765
Tested-by: build bot (Jenkins)
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
lenovo: Read mainboard version from AT24RF08C.

Tablets have different mainboard version than laptop variants.

Change-Id: I77a1e2b50d30dcf3fa064e0c378ceca7ccf96e89
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/6785
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
Tested-by: build bot (Jenkins)
ec/lenovo/h8: Rename LED to avoid conflicting with thinkpad-acpi

Change-Id: I9fd7f894d0e611f61e8702e4eacb12d7b81154d8
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/6789
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>
ec/lenovo/h8: Implement thinkpad-acpi compatible LED function

Change-Id: I9998b0b4a1413ab65f1dbdf59b2f84d331ce9c3d
Signed-off-by: Vladimir Serbinenko <phcoder@gmail.com>
Reviewed-on: http://review.coreboot.org/6790
Tested-by: build bot (Jenkins)
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>