ARM: PSCI: Enable the PSCI node

When fixing up the DT to report PSCI support, explicitly enable the node.
DTs may ship with the node disabled in case a PSCI implementation is not
present, and expect any PSCI implementation to enable the node if they are
actually present.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Tom Warren <twarren@nvidia.com>

arch/arm/lib/psci-dt.c

@@ -116,6 +116,10 @@ init_psci_node:
 	if (tmp)
 		return tmp;
 
+	tmp = fdt_setprop_string(fdt, nodeoff, "status", "okay");
+	if (tmp)
+		return tmp;
+
 #endif
 	return 0;
 }