imx: imx8qm: add domain off support

Add domain off support for Linux kernel's cpu
hot-plug feature, when there are cpu off request
from Linux kernel, TF-A will send command to
system controller to do CPU power gate accordingly,
tested on i.MX8QM MEK board.

Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
diff --git a/plat/imx/common/imx8_topology.c b/plat/imx/common/imx8_topology.c
index bcb7d59..64145c4 100644
--- a/plat/imx/common/imx8_topology.c
+++ b/plat/imx/common/imx8_topology.c
@@ -11,7 +11,8 @@
 const unsigned char imx_power_domain_tree_desc[] = {
 	PWR_DOMAIN_AT_MAX_LVL,
 	PLATFORM_CLUSTER_COUNT,
-	PLATFORM_CORE_COUNT,
+	PLATFORM_CLUSTER0_CORE_COUNT,
+	PLATFORM_CLUSTER1_CORE_COUNT,
 };
 
 const unsigned char *plat_get_power_domain_tree_desc(void)