soc/intel/skylake: search for PME wake event on all root ports

Currently only the PCIe ports 1-12 are checked for a wake event. Add
ELOG wake sources for ports 13-24, if they exist.

Change-Id: Ic96e5101ad57bdecd8cbdb66379bc274ae790e01
Signed-off-by: Michael Niewöhner <foss@mniewoehner.de>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/35764
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

src/include/elog.h

@@ -149,6 +149,18 @@
 #define  ELOG_WAKE_SOURCE_PME_XHCI_USB_2   0x1d
 #define  ELOG_WAKE_SOURCE_PME_XHCI_USB_3   0x1e
 #define  ELOG_WAKE_SOURCE_PME_WIFI         0x1f
+#define  ELOG_WAKE_SOURCE_PME_PCIE13       0x20
+#define  ELOG_WAKE_SOURCE_PME_PCIE14       0x21
+#define  ELOG_WAKE_SOURCE_PME_PCIE15       0x22
+#define  ELOG_WAKE_SOURCE_PME_PCIE16       0x23
+#define  ELOG_WAKE_SOURCE_PME_PCIE17       0x24
+#define  ELOG_WAKE_SOURCE_PME_PCIE18       0x25
+#define  ELOG_WAKE_SOURCE_PME_PCIE19       0x26
+#define  ELOG_WAKE_SOURCE_PME_PCIE20       0x27
+#define  ELOG_WAKE_SOURCE_PME_PCIE21       0x28
+#define  ELOG_WAKE_SOURCE_PME_PCIE22       0x29
+#define  ELOG_WAKE_SOURCE_PME_PCIE23       0x2a
+#define  ELOG_WAKE_SOURCE_PME_PCIE24       0x2b
 
 struct elog_event_data_wake {
 	u8 source;