common/board_f.c: align m68k arch to use CONFIG_DISPLAY_CPUINFO

Change all coldfire arch files to use CONFIG_DISPLAY_CPUINFO.

Signed-off-by: Angelo Dureghello <angelo@sysam.it>
Reviewed-by: Tom Rini <trini@konsulko.com>
---
Changes for v2:
   - update common/Kconfig to add M68K to the default y list
diff --git a/arch/m68k/cpu/mcf532x/cpu.c b/arch/m68k/cpu/mcf532x/cpu.c
index 46b57e9..602c106 100644
--- a/arch/m68k/cpu/mcf532x/cpu.c
+++ b/arch/m68k/cpu/mcf532x/cpu.c
@@ -30,7 +30,8 @@
 	return 0;
 };
 
-int checkcpu(void)
+#if defined(CONFIG_DISPLAY_CPUINFO)
+int print_cpuinfo(void)
 {
 	ccm_t *ccm = (ccm_t *) MMAP_CCM;
 	u16 msk;
@@ -95,6 +96,7 @@
 
 	return 0;
 };
+#endif /* CONFIG_DISPLAY_CPUINFO */
 
 #if defined(CONFIG_WATCHDOG)
 /* Called by macro WATCHDOG_RESET */