ARM: ICST: kill duplicate icst code

The only difference between ICST307 and ICST525 are the two arrays
for calculating the S parameter; the code is now identical.  Merge
the two files and kill the duplicated code.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
diff --git a/arch/arm/mach-realview/core.c b/arch/arm/mach-realview/core.c
index 26d44ca..a8c215a 100644
--- a/arch/arm/mach-realview/core.c
+++ b/arch/arm/mach-realview/core.c
@@ -39,7 +39,7 @@
 #include <asm/leds.h>
 #include <asm/mach-types.h>
 #include <asm/hardware/arm_timer.h>
-#include <asm/hardware/icst307.h>
+#include <asm/hardware/icst.h>
 
 #include <asm/mach/arch.h>
 #include <asm/mach/flash.h>