[media] saa717x: fix multi-byte read code

As reported by smatch:
	drivers/media/i2c/saa717x.c:155 saa717x_read() warn: mask and shift to zero
	drivers/media/i2c/saa717x.c:155 saa717x_read() warn: mask and shift to zero

This is done right at saa717x_write(), but the read function is
broken. Thankfully, there's just one place at saa717x driver that
uses multibyte read (for status report, via printk).

Yet, let's fix it. From saa717x_write(), it is clear that the
bytes are in little endian:
		mm1[4] = (value >> 16) & 0xff;
		mm1[3] = (value >> 8) & 0xff;
		mm1[2] = value & 0xff;

So, the same order should be valid for read too.

Compile-tested only.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>

drivers/media/i2c/saa717x.c

@@ -152,9 +152,9 @@ static u32 saa717x_read(struct v4l2_subdev *sd, u32 reg)
 	i2c_transfer(adap, msgs, 2);
 
 	if (fw_addr)
-		value = (mm2[2] & 0xff)  | ((mm2[1] & 0xff) >> 8) | ((mm2[0] & 0xff) >> 16);
+		value = (mm2[2] << 16)  | (mm2[1] << 8) | mm2[0];
 	else
-		value = mm2[0] & 0xff;
+		value = mm2[0];
 
 	v4l2_dbg(2, debug, sd, "read:  reg 0x%03x=0x%08x\n", reg, value);
 	return value;