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/common/Kconfig b/common/Kconfig
index 4da095a..21e067c 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -533,7 +533,7 @@
 
 config DISPLAY_CPUINFO
 	bool "Display information about the CPU during start up"
-	default y if ARM || NIOS2 || X86 || XTENSA
+	default y if ARM || NIOS2 || X86 || XTENSA || M68K
 	help
 	  Display information about the CPU that U-Boot is running on
 	  when U-Boot starts up. The function print_cpuinfo() is called