Current ACPI code for UARTs uses the PNP_DEFAULT_PSC macro for _PSC (current power state) methods. Override it to `Return (0)` (i.e. cur- rent state is D0) as the IT8783E/F doesn't have power management. Change-Id: I3c858dde287dbf7e5fc0c20abb1fd374887acdde Signed-off-by: Nico Huber <nico.h@gmx.de> Reviewed-on: https://review.coreboot.org/17791 Tested-by: build bot (Jenkins) Reviewed-by: Martin Roth <martinroth@google.com>