ChromeOS: Refactor ACPI CNVS generation

Remove chromeos_dsdt_generator() calls under mainboard, it
is possible to make the single call to fill \CNVS and
\OIPG without leveraging device operations.

Change-Id: Id79af96bb6c038d273ac9c4afc723437fc1f3fc9
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55502
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Tim Wawrzynczak <twawrzynczak@chromium.org>

src/mainboard/intel/tglrvp/mainboard.c

@@ -5,7 +5,6 @@
 #include <device/device.h>
 #include <ec/ec.h>
 #include <soc/gpio.h>
-#include <vendorcode/google/chromeos/chromeos.h>
 #include <smbios.h>
 #include <string.h>
 
@@ -29,12 +28,6 @@ static void mainboard_init(void *chip_info)
 	mainboard_ec_init();
 }
 
-static void mainboard_enable(struct device *dev)
-{
-	dev->ops->acpi_inject_dsdt = chromeos_dsdt_generator;
-}
-
 struct chip_operations mainboard_ops = {
 	.init = mainboard_init,
-	.enable_dev = mainboard_enable,
 };