ARM: ux500: Rename db8500.dtsi to dbx5x0.dtsi to encompass the u9500, u8540 and u9540

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

arch/arm/boot/dts/snowball.dts

@@ -10,7 +10,7 @@
  */
 
 /dts-v1/;
-/include/ "db8500.dtsi"
+/include/ "dbx5x0.dtsi"
 
 / {
 	model = "Calao Systems Snowball platform with device tree";