[ARM] 3926/1: make timer led handle HZ != 100

The timer LED is unusable at HZ=large, since it's got
a hard-wired value of 100 ticks per cycle; when HZ=1024
(for example) it's essentially always-on.  This patch
just makes that be HZ ticks per cycle.
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>

arch/arm/kernel/time.c

@@ -220,10 +220,10 @@ EXPORT_SYMBOL(leds_event);
 #ifdef CONFIG_LEDS_TIMER
 static inline void do_leds(void)
 {
-	static unsigned int count = 50;
+	static unsigned int count = HZ/2;
 
 	if (--count == 0) {
-		count = 50;
+		count = HZ/2;
 		leds_event(led_timer);
 	}
 }