asm-h8300: parentheses around definition CLOCK_TICK_RATE

Some places where CLOCK_TICK_RATE may be used incorrectly:

arch/arm/mach-mx3/time.c:125:   __raw_writel((v / CLOCK_TICK_RATE) - 1, MXC_GPT_GPTPR);
drivers/watchdog/davinci_wdt.c:103:     timer_margin = (((u64)heartbeat * CLOCK_TICK_RATE) & 0xffffffff);
drivers/watchdog/davinci_wdt.c:105:     timer_margin = (((u64)heartbeat * CLOCK_TICK_RATE) >> 32);
drivers/watchdog/ks8695_wdt.c:64:       unsigned long tval = wdt_time * CLOCK_TICK_RATE;

I'm not sure whether this definition is used there, but adding parentheses
should be good anyway.

Signed-off-by: Roel Kluin <12o3l@tiscali.nl>
Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>