ARM: dts: vexpress: Add missing newline at end of file

"git diff" says:

    \ No newline at end of file

after modifying the file.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

arch/arm/boot/dts/vexpress-v2m.dtsi

@@ -451,4 +451,4 @@ dvimode {
 			};
 		};
 	};
-};
\ No newline at end of file
+};