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/m54xxsim.h b/arch/m68k/include/asm/m54xxsim.h
index d69a64f..6072248 100644
--- a/arch/m68k/include/asm/m54xxsim.h
+++ b/arch/m68k/include/asm/m54xxsim.h
@@ -5,9 +5,10 @@
 #ifndef	m54xxsim_h
 #define m54xxsim_h
 
-#define	CPU_NAME	"COLDFIRE(m54xx)"
+#define	CPU_NAME		"COLDFIRE(m54xx)"
+#define	CPU_INSTR_PER_JIFFY	2
 
-#define MCFINT_VECBASE      64
+#define MCFINT_VECBASE		64
 
 /*
  *      Interrupt Controller Registers