ARM64: dts: am654x-base-board: enable SGX node

SGX Graphics Processing Unit node is enabled for am654x base board.
SGX device node properties are inherited from base am654x dtsi file.

Signed-off-by: Eric Ruei <e-ruei1@ti.com>
Signed-off-by: Anand Balagopalakrishnan <anandb@ti.com>
[praneeth@ti.com: rebase from graphics-ti-linux-4.14.y]
Signed-off-by: Praneeth Bajjuri <praneeth@ti.com>

arch/arm64/boot/dts/ti/k3-am654-base-board.dts

@@ -246,3 +246,7 @@
 	non-removable;
 	ti,driver-strength-ohm = <50>;
 };
+
+&gpu {
+	status = "okay";
+};