workaround for timer glitch on some boards

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@8483 3c298f89-4303-0410-b956-a3cf2f4a3e73

target/linux/brcm-2.4/files/arch/mips/bcm947xx/time.c

@@ -99,6 +99,17 @@ static struct irqaction bcm947xx_timer_irqaction = {
 void __init
 bcm947xx_timer_setup(struct irqaction *irq)
 {
+	int x;
+
 	/* Enable the timer interrupt */
 	setup_irq(7, &bcm947xx_timer_irqaction);
+
+	sti();
+
+	for (x=0; x<5; x++) {
+		unsigned long ticks; 
+		ticks = jiffies;
+		while (ticks == jiffies) 
+			/* do nothing */;
+	}
 }