soc/amd/cezanne/acpi/soc.asl: Include sleepstates.asl

Needed to get the _SX ASL methods.

Signed-off-by: Raul E Rangel <rrangel@chromium.org>
Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I6323ba413a21d9d867727dbb28340e6df807c86a
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51303
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/cezanne/acpi/soc.asl

@@ -17,6 +17,8 @@ Scope(\_SB) {
 
 #include <soc/amd/common/acpi/platform.asl>
 
+#include <soc/amd/common/acpi/sleepstates.asl>
+
 /*
  * Platform Wake Notify
  *