m68knommu: fix clock rate value reported for ColdFire 54xx parts

The instruction timings of the ColdFire 54xx family parts are
different to other version 4 parts (or version 2 or 3 parts for
that matter too).

Move the instruction timing setting into the ColdFire part
specific headers, and set the 54xx value appropriately.

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 9f4688b..b8126d3 100644
--- a/arch/m68k/include/asm/m532xsim.h
+++ b/arch/m68k/include/asm/m532xsim.h
@@ -9,7 +9,8 @@
 #define	m532xsim_h
 /****************************************************************************/
 
-#define	CPU_NAME	"COLDFIRE(m532x)"
+#define	CPU_NAME		"COLDFIRE(m532x)"
+#define	CPU_INSTR_PER_JIFFY	3
 
 #define MCF_REG32(x) (*(volatile unsigned long  *)(x))
 #define MCF_REG16(x) (*(volatile unsigned short *)(x))