ARM: ux500: fix devicetree builds

The patch set beginning with commit:
"ARM: ux500: Apply a ste-* prefix onto snowball.dts"
thru commit:
"ARM: ux500: Remove u9540.dts as it's been replaced"
altered the names of the ux500 device tree files but forgot
to:

- Rename the ccu8540-pinctrl.dtsi file

- Update #include statements from files using these
  files, so the build broke.

- Update the Makefile for the device trees so the build
  broke.

Fix it up so we can build them all again.

Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com>
diff --git a/arch/arm/boot/dts/ste-hrefv60plus.dts b/arch/arm/boot/dts/ste-hrefv60plus.dts
index 3d580d6..6e52ebb 100644
--- a/arch/arm/boot/dts/ste-hrefv60plus.dts
+++ b/arch/arm/boot/dts/ste-hrefv60plus.dts
@@ -10,9 +10,9 @@
  */
 
 /dts-v1/;
-#include "dbx5x0.dtsi"
-#include "href.dtsi"
-#include "stuib.dtsi"
+#include "ste-dbx5x0.dtsi"
+#include "ste-href.dtsi"
+#include "ste-stuib.dtsi"
 
 / {
 	model = "ST-Ericsson HREF (v60+) platform with Device Tree";