i2c-s3c2410: Correct use of ! and &

In commit e6bafba5, a bug was fixed that
involved converting !x & y to !(x & y).  The code below shows the same
pattern, and thus should perhaps be fixed in the same way.  In particular,
the result of !readl(i2c->regs + S3C2410_IICCON) & S3C2410_IICCON_IRQEN is
always 0.

The semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@@ expression E; constant C; @@
(
  !E & !C
|
- !E & C
+ !(E & C)
)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Cc: Ben Dooks <ben-linux@fluff.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Jean Delvare <khali@linux-fr.org>

drivers/i2c/busses/i2c-s3c2410.c

@@ -507,7 +507,7 @@ static int s3c24xx_i2c_doxfer(struct s3c24xx_i2c *i2c, struct i2c_msg *msgs, int
 	unsigned long timeout;
 	int ret;
 
-	if (!readl(i2c->regs + S3C2410_IICCON) & S3C2410_IICCON_IRQEN)
+	if (!(readl(i2c->regs + S3C2410_IICCON) & S3C2410_IICCON_IRQEN))
 		return -EIO;
 
 	ret = s3c24xx_i2c_set_master(i2c);