ti: k3: common: Add root domain node to platform topology

Actions may need to be taken by the last core when all clusters
have been shutdown. Add a top level root domain node to coordinate
this between clusters.
Signed-off-by: Andrew F. Davis <afd@ti.com>

plat/ti/k3/common/k3_topology.c

@@ -9,6 +9,7 @@
 
 /* The power domain tree descriptor */
 static unsigned char power_domain_tree_desc[] = {
+	PLATFORM_SYSTEM_COUNT,
 	PLATFORM_CLUSTER_COUNT,
 	K3_CLUSTER0_CORE_COUNT,
 #if K3_CLUSTER1_MSMC_PORT != UNUSED

plat/ti/k3/include/platform_def.h

@@ -62,9 +62,10 @@
 
 #define PLATFORM_CLUSTER_OFFSET		K3_CLUSTER0_MSMC_PORT
 
-#define PLAT_NUM_PWR_DOMAINS		(PLATFORM_CLUSTER_COUNT + \
+#define PLAT_NUM_PWR_DOMAINS		(PLATFORM_SYSTEM_COUNT + \
+					PLATFORM_CLUSTER_COUNT + \
 					PLATFORM_CORE_COUNT)
-#define PLAT_MAX_PWR_LVL		MPIDR_AFFLVL1
+#define PLAT_MAX_PWR_LVL		MPIDR_AFFLVL2
 
 /*******************************************************************************
  * Memory layout constants