arm64: dts: mt7986: fix trng node name

Binding requires node name to be rng not trng:

trng@1020f000: $nodename:0: 'trng@1020f000' does not match '^rng@[0-9a-f]+$'

Fixes: 50137c15 ("arm64: dts: mediatek: add basic mt7986 support")
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20221027151022.5541-1-linux@fw-web.deSigned-off-by: Matthias Brugger <matthias.bgg@gmail.com>

arch/arm64/boot/dts/mediatek/mt7986a.dtsi

@@ -168,7 +168,7 @@ sgmiisys1: syscon@10070000 {
 			#clock-cells = <1>;
 		};
 
-		trng: trng@1020f000 {
+		trng: rng@1020f000 {
 			compatible = "mediatek,mt7986-rng",
 				     "mediatek,mt7623-rng";
 			reg = <0 0x1020f000 0 0x100>;