arm64: dts: rename ns2.txt to brcm,ns2.txt

Rename ns2.txt to brcm,ns2.txt to match naming convention followed
by rest of Broadcom binding documentation.

Signed-off-by: Scott Branden <scott.branden@broadcom.com>
Reviewed-by: Ray Jui <ray.jui@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>

diff --git a/Documentation/devicetree/bindings/arm/bcm/ns2.txt b/Documentation/devicetree/bindings/arm/bcm/brcm,ns2.txt
similarity index 100%
rename from Documentation/devicetree/bindings/arm/bcm/ns2.txt
rename to Documentation/devicetree/bindings/arm/bcm/brcm,ns2.txt