mtd: parsers: trx: fix pr_err format for printing offset

This fixes following warning:
include/linux/kern_levels.h:4:18: warning: format '%X' expects argument of type 'unsigned int', but argument 2 has type 'size_t {aka long unsigned int}' [-Wformat=]

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>

drivers/mtd/parsers/parser_trx.c

@@ -39,7 +39,7 @@ static const char *parser_trx_data_part_name(struct mtd_info *master,
 	err  = mtd_read(master, offset, sizeof(buf), &bytes_read,
 			(uint8_t *)&buf);
 	if (err && !mtd_is_bitflip(err)) {
-		pr_err("mtd_read error while parsing (offset: 0x%X): %d\n",
+		pr_err("mtd_read error while parsing (offset: 0x%zX): %d\n",
 			offset, err);
 		goto out_default;
 	}