cpu/intel/model_206ax: Rename cX_acpower options

They aren't specific to AC power operation anymore. Also adapt autoport.

Change-Id: Ib04d0a08674b7d2773d440d39bd6dfbd4359e0fb
Signed-off-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/49089
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

util/autoport/sandybridge.go

@@ -44,9 +44,9 @@ func (i sandybridgemc) Scan(ctx Context, addr PCIDevData) {
 						Comment: "FIXME: check all registers",
 						Registers: map[string]string{
 							/* FIXME:XX hardcoded.  */
-							"c1_acpower": "1",
-							"c2_acpower": "3",
-							"c3_acpower": "5",
+							"acpi_c1": "1",
+							"acpi_c2": "3",
+							"acpi_c3": "5",
 						},
 						Children: []DevTreeNode{
 							{