m68knommu: remove ColdFire CLOCK_DIV config option

The reality is that you do not need the abiltity to configure the
clock divider for ColdFire CPUs. It is a fixed ratio on any given
ColdFire family member. It is not the same for all ColdFire parts,
but it is always the same in a model range. So hard define the divider
for each supported ColdFire CPU type and remove the Kconfig option.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
diff --git a/arch/m68k/include/asm/m532xsim.h b/arch/m68k/include/asm/m532xsim.h
index 0dea126..ba4cc78 100644
--- a/arch/m68k/include/asm/m532xsim.h
+++ b/arch/m68k/include/asm/m532xsim.h
@@ -11,6 +11,7 @@
 
 #define	CPU_NAME		"COLDFIRE(m532x)"
 #define	CPU_INSTR_PER_JIFFY	3
+#define	MCF_BUSCLK		(MCF_CLK / 3)
 
 #include <asm/m53xxacr.h>