m68knommu: allow for configuration of true 68000 based systems

Allow the M68000 option to be user configurable, for systems based on
the original stand alone 68000 CPU.
Signed-off-by: Luis Alves <ljalvs@gmail.com>
Signed-off-by: Greg Ungerer <gerg@uclinux.org>

arch/m68k/Kconfig.cpu

@@ -35,7 +35,7 @@ endchoice
 if M68KCLASSIC
 
 config M68000
-	bool
+	bool "MC68000"
 	select CPU_HAS_NO_BITFIELDS
 	select CPU_HAS_NO_MULDIV64
 	select CPU_HAS_NO_UNALIGNED