ARM: dts: BCM5301X: Fix UARTs on bcm953012k

The UARTs are outputting garbage on the console.  This is due to a speed
issue.  We can simply use the clock speed (which is now defined in the
DTSI file) and everything works fine.
Signed-off-by: Jon Mason <jon.mason@broadcom.com>
Fixes: cdc36b22 ("ARM: dts: enable clock support for BCM5301X")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

arch/arm/boot/dts/bcm953012k.dts

@@ -53,10 +53,9 @@ memory {
 };
 
 &uart0 {
-	clock-frequency = <62499840>;
+	status = "okay";
 };
 
 &uart1 {
-	clock-frequency = <62499840>;
 	status = "okay";
 };