cpu/x86/smm: Define APM_CNT_ROUTE_ALL_XHCI

Change-Id: I0bc321f499278e0cdbfb40be9a2b2ae21828d2f4
Signed-off-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42619
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/include/cpu/x86/smm.h

@@ -24,6 +24,7 @@
 #define APM_CNT_ACPI_ENABLE	0xe1
 #define APM_CNT_MBI_UPDATE	0xeb
 #define APM_CNT_GNVS_UPDATE	0xea
+#define APM_CNT_ROUTE_ALL_XHCI	0xca
 #define APM_CNT_FINALIZE	0xcb
 #define APM_CNT_LEGACY		0xcc
 #define APM_CNT_SMMINFO		0xec