[media] i2c/s5k4ecgx: fix printk format warning

Fix printk format warning for size_t variable:
drivers/media/i2c/s5k4ecgx.c:346:2: warning: format '%d' expects type 'int', but argument 4 has type 'size_t'

Signed-off-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/i2c/s5k4ecgx.c b/drivers/media/i2c/s5k4ecgx.c
index 49c1b3a..2750de6 100644
--- a/drivers/media/i2c/s5k4ecgx.c
+++ b/drivers/media/i2c/s5k4ecgx.c
@@ -343,7 +343,7 @@
 	}
 	regs_num = le32_to_cpu(get_unaligned_le32(fw->data));
 
-	v4l2_dbg(3, debug, sd, "FW: %s size %d register sets %d\n",
+	v4l2_dbg(3, debug, sd, "FW: %s size %zu register sets %d\n",
 		 S5K4ECGX_FIRMWARE, fw->size, regs_num);
 
 	regs_num++; /* Add header */