arm64: dts: mediatek: mt8186: Fix alias prefix for ovl_2l0

The alias prefix for ovl_2l (2 layer overlay) is "ovl-2l", not "ovl_2l".

Fix this.

Fixes: 7e07d332 ("arm64: dts: mediatek: mt8186: Add display nodes")
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Link: https://lore.kernel.org/r/20231130074032.913511-4-wenst@chromium.orgSigned-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>

arch/arm64/boot/dts/mediatek/mt8186.dtsi

@@ -22,7 +22,7 @@ / {
 
 	aliases {
 		ovl0 = &ovl0;
-		ovl_2l0 = &ovl_2l0;
+		ovl-2l0 = &ovl_2l0;
 		rdma0 = &rdma0;
 		rdma1 = &rdma1;
 	};