cmd/eeprom.c: prepend 0x to hex numbers in output message format

If the numbers do not happen to contain any digits from [a-f], it's
not clear that they are base 16.

Signed-off-by: Klaus H. Sorensen <khso@prevas.dk>
Signed-off-by: Rasmus Villemoes <rasmus.villemoes@prevas.dk>
Reviewed-by: Lukasz Majewski <lukma@denx.de>
Reviewed-by: Heiko Schocher <hs@denx.de>
diff --git a/cmd/eeprom.c b/cmd/eeprom.c
index 4a1569b..667149e 100644
--- a/cmd/eeprom.c
+++ b/cmd/eeprom.c
@@ -308,7 +308,7 @@
 {
 	int rcode = 0;
 	const char *const fmt =
-		"\nEEPROM @0x%lX %s: addr %08lx  off %04lx  count %ld ... ";
+		"\nEEPROM @0x%lX %s: addr 0x%08lx  off 0x%04lx  count %ld ... ";
 #ifdef CONFIG_CMD_EEPROM_LAYOUT
 	struct eeprom_layout layout;
 #endif