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-integrator/clock.c b/arch/arm/mach-integrator/clock.c
index a4f80d3..52fc294 100644
--- a/arch/arm/mach-integrator/clock.c
+++ b/arch/arm/mach-integrator/clock.c
@@ -14,7 +14,7 @@
 #include <linux/clk.h>
 #include <linux/mutex.h>
 
-#include <asm/hardware/icst525.h>
+#include <asm/hardware/icst.h>
 #include <asm/clkdev.h>
 #include <mach/clkdev.h>
 
@@ -38,8 +38,8 @@
 long clk_round_rate(struct clk *clk, unsigned long rate)
 {
 	struct icst_vco vco;
-	vco = icst525_hz_to_vco(clk->params, rate);
-	return icst525_hz(clk->params, vco);
+	vco = icst_hz_to_vco(clk->params, rate);
+	return icst_hz(clk->params, vco);
 }
 EXPORT_SYMBOL(clk_round_rate);
 
@@ -50,8 +50,8 @@
 	if (clk->setvco) {
 		struct icst_vco vco;
 
-		vco = icst525_hz_to_vco(clk->params, rate);
-		clk->rate = icst525_hz(clk->params, vco);
+		vco = icst_hz_to_vco(clk->params, rate);
+		clk->rate = icst_hz(clk->params, vco);
 		clk->setvco(clk, vco);
 		ret = 0;
 	}