cmd, nand: fix broken output of "nand info"

If the value of either "nand options" or "bbt options" has a zero in
the most significant nibble, the '0x' prefix will be isolated from the
value like shown below:
|Device 0: nand0, sector size 128 KiB
|  Page size       2048 b
|  OOB size          64 b
|  Erase size    131072 b
|  subpagesize     2048 b
|  options     0x40000200
|  bbt options 0x   60000

Change the format string to produce leading zeroes filling the gap.

Signed-off-by: Lothar Waßmann <LW@KARO-electronics.de>

cmd/nand.c

@@ -295,8 +295,8 @@ static void nand_print_and_set_info(int idx)
 	printf("  OOB size    %8d b\n", mtd->oobsize);
 	printf("  Erase size  %8d b\n", mtd->erasesize);
 	printf("  subpagesize %8d b\n", chip->subpagesize);
-	printf("  options     0x%8x\n", chip->options);
-	printf("  bbt options 0x%8x\n", chip->bbt_options);
+	printf("  options     0x%08x\n", chip->options);
+	printf("  bbt options 0x%08x\n", chip->bbt_options);
 
 	/* Set geometry info */
 	setenv_hex("nand_writesize", mtd->writesize);