zynqmp: pm: Remove unused NODE_AFI, add NODE_EXTERN

NODE_EXTERN is the slave node which represents an external wake
source.
Signed-off-by: Mirela Simonovic <mirela.simonovic@aggios.com>
Acked-by: Will Wong <willw@xilinx.com>

plat/xilinx/zynqmp/pm_service/pm_defs.h

@@ -141,7 +141,7 @@ enum pm_node_id {
 	NODE_GPIO,
 	NODE_CAN_0,
 	NODE_CAN_1,
-	NODE_AFI,
+	NODE_EXTERN,
 	NODE_APLL,
 	NODE_VPLL,
 	NODE_DPLL,