soc/amd/stoneyridge/acpi: rename cpu.asl to pnot.asl

After the patch that moved the generation of the PPKG object to
Stoneyridge's acpi.c, only the PNOT object remained in its cpu.asl, so
rename it to pnot.asl.

Signed-off-by: Felix Held <felix-coreboot@felixheld.de>
Change-Id: I0deb2d75cae98b8fcd31297d7fac5f27525efe65
Reviewed-on: https://review.coreboot.org/c/coreboot/+/62540
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Raul Rangel <rrangel@chromium.org>

src/mainboard/amd/gardenia/dsdt.asl

@@ -24,8 +24,8 @@ DefinitionBlock (
 	/* PCI IRQ mapping for the Southbridge */
 	#include <pcie.asl>
 
-	/* Describe the processor tree (\_SB) */
-	#include <cpu.asl>
+	/* Power state notification */
+	#include <pnot.asl>
 
 	/* Contains the supported sleep states for this chipset */
 	#include <soc/amd/common/acpi/sleepstates.asl>

src/mainboard/amd/padmelon/dsdt.asl

@@ -22,8 +22,8 @@ DefinitionBlock (
 	/* PCI IRQ mapping for the Southbridge */
 	#include <pcie.asl>
 
-	/* Describe the processor tree (\_SB) */
-	#include <cpu.asl>
+	/* Power state notification */
+	#include <pnot.asl>
 
 	/* Contains the supported sleep states for this chipset */
 	#include <soc/amd/common/acpi/sleepstates.asl>

src/mainboard/google/kahlee/dsdt.asl

@@ -24,8 +24,8 @@ DefinitionBlock (
 	/* PCI IRQ mapping for the Southbridge */
 	#include <pcie.asl>
 
-	/* Describe the processor tree (\_SB) */
-	#include <cpu.asl>
+	/* Power state notification */
+	#include <pnot.asl>
 
 	/* Contains the supported sleep states for this chipset */
 	#include <soc/amd/common/acpi/sleepstates.asl>