arch/alpha/kernel/sys_ruffian.c: Use DIV_ROUND_CLOSEST

The kernel.h macro DIV_ROUND_CLOSEST performs the computation (x + d/2)/d
but is perhaps more readable.

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

// <smpl>
@haskernel@
@@

@depends on haskernel@
expression x,__divisor;
@@

- (((x) + ((__divisor) / 2)) / (__divisor))
+ DIV_ROUND_CLOSEST(x,__divisor)
// </smpl>

Signed-off-by: Julia Lawall <[e-mail]>
Cc: Ivan Kokshaysky <[e-mail]>
Cc: Richard Henderson <[e-mail]>
Signed-off-by: Matt Turner <[e-mail]>

arch/alpha/kernel/sys_ruffian.c

···
 	common_init_isa_dma();
 }
 
-#define RUFFIAN_LATCH	((PIT_TICK_RATE + HZ / 2) / HZ)
+#define RUFFIAN_LATCH	DIV_ROUND_CLOSEST(PIT_TICK_RATE, HZ)
 
 static void __init
 ruffian_init_rtc(void)