m68knommu: add support for the ColdFire 537x family of CPUs

The ColdFire 537x family is very similar internally to the ColdFire 532x
family. So with just a little extra configuration we can configure and
target them as well.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>
diff --git a/arch/m68k/Kconfig.cpu b/arch/m68k/Kconfig.cpu
index c94b930..2debb55 100644
--- a/arch/m68k/Kconfig.cpu
+++ b/arch/m68k/Kconfig.cpu
@@ -235,6 +235,14 @@
 	help
 	  Freescale (Motorola) ColdFire 532x processor support.
 
+config M537x
+	bool "MCF537x"
+	depends on !MMU
+	select M53xx
+	select HAVE_CACHE_CB
+	help
+	  Freescale ColdFire 537x processor support.
+
 config M5407
 	bool "MCF5407"
 	depends on !MMU