arm64: dts: ti: k3-am65-wakeup: Add debug region to TI-SCI node

Lets add the TISCI debug region to TI-SCI region in line with TI-SCI
documentation[1]. While at it, lets rename the node to indicate the
address usage.

[1] http://downloads.ti.com/tisci/esd/latest/4_trace/trace.htmlSigned-off-by: Nishanth Menon <nm@ti.com>
Reviewed-by: Tero Kristo <kristo@kernel.org>
Link: https://lore.kernel.org/r/20210510145033.7426-3-nm@ti.com

arch/arm64/boot/dts/ti/k3-am65-wakeup.dtsi

@@ -6,7 +6,7 @@
  */
 
 &cbass_wakeup {
-	dmsc: dmsc {
+	dmsc: dmsc@44083000 {
 		compatible = "ti,am654-sci";
 		ti,host-id = <12>;
 		#address-cells = <1>;
@@ -18,6 +18,9 @@ dmsc: dmsc {
 		mboxes= <&secure_proxy_main 11>,
 			<&secure_proxy_main 13>;
 
+		reg-names = "debug_messages";
+		reg = <0x44083000 0x1000>;
+
 		k3_pds: power-controller {
 			compatible = "ti,sci-pm-domain";
 			#power-domain-cells = <2>;