bmips: bcm6838: fix device tree warning

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
diff --git a/arch/mips/dts/brcm,bcm6838.dtsi b/arch/mips/dts/brcm,bcm6838.dtsi
index 1018f9e..77d6a8e 100644
--- a/arch/mips/dts/brcm,bcm6838.dtsi
+++ b/arch/mips/dts/brcm,bcm6838.dtsi
@@ -31,8 +31,6 @@
 
 	clocks {
 		compatible = "simple-bus";
-		#address-cells = <1>;
-		#size-cells = <1>;
 		u-boot,dm-pre-reloc;
 
 		periph_osc: periph-osc {