USB: use DIV_ROUND_UP

The kernel.h macro DIV_ROUND_UP performs the computation (((n) + (d) - 1) /
(d)) but is perhaps more readable.

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

// <smpl>
@haskernel@
@@

#include <linux/kernel.h>

@depends on haskernel@
expression n,d;
@@

(
- (n + d - 1) / d
+ DIV_ROUND_UP(n,d)
|
- (n + (d - 1)) / d
+ DIV_ROUND_UP(n,d)
)

@depends on haskernel@
expression n,d;
@@

- DIV_ROUND_UP((n),d)
+ DIV_ROUND_UP(n,d)

@depends on haskernel@
expression n,d;
@@

- DIV_ROUND_UP(n,(d))
+ DIV_ROUND_UP(n,d)
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/serial/io_ti.c

@@ -654,7 +654,7 @@ static void TIChasePort(struct edgeport_port *port, unsigned long timeout, int f
 	/* (TIIsTxActive doesn't seem to wait for the last byte) */
 	if ((baud_rate=port->baud_rate) == 0)
 		baud_rate = 50;
-	msleep(max(1,(10000+baud_rate-1)/baud_rate));
+	msleep(max(1, DIV_ROUND_UP(10000, baud_rate)));
 }
 
 static int TIChooseConfiguration (struct usb_device *dev)