staging: mt7621-dts: Replace spaces with tabs in indentation

Replace spaces with tabs in indentation.
Issue found with checkpatch.

Signed-off-by: Nishka Dasgupta <nishka.dasgupta_ug18@ashoka.edu.in>
Acked-by: Julia Lawall <julia.lawall@lip6.fr>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/mt7621-dts/mt7621.dtsi

@@ -142,7 +142,7 @@
 		mc: mc@1fbf8000 {
 			    compatible = "mtk,mt7621-mc";
 			    reg = <0x1fbf8000 0x8000>;
- 		};
+		};
 
 		uartlite: uartlite@c00 {
 			compatible = "ns16550a";