Trim .acpi_fill_ssdt_generator and .acpi_inject_dsdt_generator

These two identifiers were always very confusing. We're not filling and
injecting generators. We are filling SSDTs and injecting into the DSDT.
So drop the `_generator` suffix. Hopefully, this also makes ACPI look a
little less scary.

Change-Id: I6f0e79632c9c855f38fe24c0186388a25990c44d
Signed-off-by: Nico Huber <nico.huber@secunet.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/39977
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Reviewed-by: David Guckian
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/google/jecht/mainboard.c

@@ -34,7 +34,7 @@ static void mainboard_init(struct device *dev)
 static void mainboard_enable(struct device *dev)
 {
 	dev->ops->init = mainboard_init;
-	dev->ops->acpi_inject_dsdt_generator = chromeos_dsdt_generator;
+	dev->ops->acpi_inject_dsdt = chromeos_dsdt_generator;
 }
 
 struct chip_operations mainboard_ops = {