arm/PSCI: Removed unused code

Identify the PSCI node only by its name, so removed the code finding
it by compatible string.

Signed-off-by: Hou Zhiqiang <Zhiqiang.Hou@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>

arch/arm/lib/psci-dt.c

@@ -51,27 +51,10 @@ int fdt_psci(void *fdt)
 		fdt_setprop_string(fdt, tmp, "enable-method", "psci");
 	}
 
-	/*
-	 * The PSCI node might be called "/psci" or might be called something
-	 * else but contain either of the compatible strings
-	 * "arm,psci"/"arm,psci-0.2"
-	 */
 	nodeoff = fdt_path_offset(fdt, "/psci");
 	if (nodeoff >= 0)
 		goto init_psci_node;
 
-	nodeoff = fdt_node_offset_by_compatible(fdt, -1, "arm,psci");
-	if (nodeoff >= 0)
-		goto init_psci_node;
-
-	nodeoff = fdt_node_offset_by_compatible(fdt, -1, "arm,psci-0.2");
-	if (nodeoff >= 0)
-		goto init_psci_node;
-
-	nodeoff = fdt_node_offset_by_compatible(fdt, -1, "arm,psci-1.0");
-	if (nodeoff >= 0)
-		goto init_psci_node;
-
 	nodeoff = fdt_path_offset(fdt, "/");
 	if (nodeoff < 0)
 		return nodeoff;