ARM: dts: broadcom: bcm21664: Move chosen node into Garnet DTS

The serial console settings in the chosen node are device-specific,
not SoC-specific. Move the chosen node out of bcm21664.dtsi and into
the only DTS that uses it, bcm21664-garnet.dts.

Signed-off-by: Artur Weber <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Florian Fainelli <[e-mail]>

arch/arm/boot/dts/broadcom/bcm21664-garnet.dts

···
 	model = "BCM21664 Garnet board";
 	compatible = "brcm,bcm21664-garnet", "brcm,bcm21664";
 
+	chosen {
+		bootargs = "console=ttyS0,115200n8";
+	};
+
 	memory@80000000 {
 		device_type = "memory";
 		reg = <0x80000000 0x40000000>; /* 1 GB */

arch/arm/boot/dts/broadcom/bcm21664.dtsi

···
 	compatible = "brcm,bcm21664";
 	interrupt-parent = <&gic>;
 
-	chosen {
-		bootargs = "console=ttyS0,115200n8";
-	};
-
 	cpus {
 		#address-cells = <1>;
 		#size-cells = <0>;