drvs/lenovo/wacom: Clean ACPI code

Use acpigen method to return _STA instead of hardcoding unreadable
bytecode.

Change-Id: I290fb918675857e8ef798e3ab820bcfbdc6f5bdc
Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-on: https://review.coreboot.org/20982
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
1 file changed