soc/amd/sabrina/acpi/soc.asl: re-enable WAL1 call in PNOT method

Now that the FSP provides the ALIB ACPI table via a HOB, the PNOT power
notify method can call WAL1 which will then call ALIB to communicate the
current AC/DC state to the SMU.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: Ic966b73aa28f329207f8d840ca5fb5f2bf6ec9b7
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64667
Reviewed-by: Raul Rangel <rrangel@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/sabrina/acpi/soc.asl

@@ -39,6 +39,5 @@ Scope(\_SB) {
 Method (PNOT)
 {
 	/* Report AC/DC state to ALIB using WAL1() */
-	/* TODO: b/228496169 - Re-enable */
-	/* \WAL1 () */
+	\WAL1 ()
 }