ARM: ux500: Apply a ste-* prefix onto stuib.dtsi

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>

diff --git a/arch/arm/boot/dts/stuib.dtsi b/arch/arm/boot/dts/ste-stuib.dtsi
similarity index 100%
rename from arch/arm/boot/dts/stuib.dtsi
rename to arch/arm/boot/dts/ste-stuib.dtsi