ARM: dts: berlin: Align L2 cache-controller nodename with dtschema

Fix dtschema validator warnings like:
    l2-cache-controller@ac0000: $nodename:0:
        'l2-cache-controller@ac0000' does not match '^(cache-controller|cpu)(@[0-9a-f,]+)*$'

Signed-off-by: Krzysztof Kozlowski <[email protected]>
Reviewed-by: Jisheng Zhang <[email protected]>
Link: https://lore.kernel.org/r/[email protected]'
Signed-off-by: Arnd Bergmann <[email protected]>

Author: krzk

arch/arm/boot/dts/berlin2.dtsi

@@ -106,7 +106,7 @@
 			status = "disabled";
 		};
 
-		l2: l2-cache-controller@ac0000 {
+		l2: cache-controller@ac0000 {
 			compatible = "marvell,tauros3-cache", "arm,pl310-cache";
 			reg = <0xac0000 0x1000>;
 			cache-unified;

arch/arm/boot/dts/berlin2cd.dtsi

@@ -71,7 +71,7 @@
 			status = "disabled";
 		};
 
-		l2: l2-cache-controller@ac0000 {
+		l2: cache-controller@ac0000 {
 			compatible = "arm,pl310-cache";
 			reg = <0xac0000 0x1000>;
 			cache-unified;

arch/arm/boot/dts/berlin2q.dtsi

@@ -149,7 +149,7 @@
 			status = "disabled";
 		};
 
-		l2: l2-cache-controller@ac0000 {
+		l2: cache-controller@ac0000 {
 			compatible = "arm,pl310-cache";
 			reg = <0xac0000 0x1000>;
 			cache-unified;