superio/acpi/pnp_generic.asl: Add _PRS for each device

Simply return the current resource settings in the _PRS method. This
means that coreboot has to correctly set up the resources on the
device. This won't result in any regression as without _PRS the ACPI
OS would not know what resources settings are valid, so it would never
use _SRS.

Change-Id: I2726714cbe076fc7c772c06883d8551400ff2baa
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64218
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Elyes Haouas <ehaouas@noos.fr>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Martin Roth <martin.roth@amd.corp-partner.google.com>

src/superio/acpi/pnp_generic.asl

@@ -171,4 +171,12 @@ Device (SUPERIO_ID(PN, SUPERIO_PNP_LDN)) {
 		  Store (One, PNP_DEVICE_ACTIVE)
 		EXIT_CONFIG_MODE ()
 	}
+
+	/* This is used for _SRS. Since _DIS only disables the device
+	 * without changing the resources this works.
+	 */
+	Method (_PRS, 0)
+	{
+		return (_CRS)
+	}
 }