mtd: cmdlineparts: Use 64-bit format when printing a debug message.

Commit 69423d99 ("[MTD] update internal 
API to support 64-bit device size") has changed some structure values
to 64-bit and has not updated this debug message, since it's not built 
by default.
Signed-off-by: NThadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>

drivers/mtd/cmdlinepart.c

@@ -194,7 +194,7 @@ static struct mtd_partition * newpart(char *s,
 	parts[this_part].name = extra_mem;
 	extra_mem += name_len + 1;
 
-	dbg(("partition %d: name <%s>, offset %x, size %x, mask flags %x\n",
+	dbg(("partition %d: name <%s>, offset %llx, size %llx, mask flags %x\n",
 	     this_part,
 	     parts[this_part].name,
 	     parts[this_part].offset,