console: Add hexdump32 function

Add a function to display memory locations in the console
logfile.

Change-Id: Iddb8d2e7a24357075f32c2fdf7916ae7a732247d
Signed-off-by: Marc Jones <marc.jones@se-eng.com>
Reviewed-on: http://review.coreboot.org/4013
Tested-by: build bot (Jenkins)
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>

src/include/console/console.h

@@ -76,6 +76,7 @@ void post_code(u8 value);
 void mainboard_post(u8 value);
 void __attribute__ ((noreturn)) die(const char *msg);
 int do_printk(int msg_level, const char *fmt, ...) __attribute__((format(printf, 2, 3)));
+void hexdump32(char LEVEL, const void *d, int len);
 
 #if defined(__BOOT_BLOCK__) && !CONFIG_BOOTBLOCK_CONSOLE || \
     (defined(__PRE_RAM__) && !defined(__BOOT_BLOCK__)) && !CONFIG_EARLY_CONSOLE