MIPS: Alchemy: update core interrupt code.

This patch attempts to modernize core Alchemy interrupt handling code.

- add irq_chips for irq controllers instead of irq type,
- add a set_type() hook to change irq trigger type during runtime,
- add a set_wake() hook to control GPIO0..7 based wakeup,
- use linux' IRQF_TRIGGER_ constants instead of homebrew ones,
- enable GENERIC_HARDIRQS_NO__DO_IRQ.
- simplify plat_irq_dispatch
- merge au1xxx_irqmap into irq.c file, the only place where its
  contents are referenced.
- board_init_irq() is now mandatory for every board; use it to register
  the remaining (gpio-based) interrupt sources; update all boards
  accordingly.

Run-tested on Db1200 and other Au1200 based platforms.

Signed-off-by: Manuel Lauss <mano@roarinelk.homelinux.net>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

 delete mode 100644 arch/mips/alchemy/common/au1xxx_irqmap.c

arch/mips/alchemy/common/power.c

@@ -51,7 +51,6 @@ static void au1000_calibrate_delay(void);
 
 extern unsigned long save_local_and_disable(int controller);
 extern void restore_local_and_enable(int controller, unsigned long mask);
-extern void local_enable_irq(unsigned int irq_nr);
 
 static DEFINE_SPINLOCK(pm_lock);
 
@@ -364,7 +363,10 @@ static int pm_do_freq(ctl_table *ctl, int write, struct file *file,
 	 */
 	intc0_mask = save_local_and_disable(0);
 	intc1_mask = save_local_and_disable(1);
-	local_enable_irq(AU1000_TOY_MATCH2_INT);
+	val = 1 << (AU1000_TOY_MATCH2_INT - AU1000_INTC0_INT_BASE);
+	au_writel(val, IC0_MASKSET);	/* unmask */
+	au_writel(val, IC0_WAKESET);	/* enable wake-from-sleep */
+	au_sync();
 	spin_unlock_irqrestore(&pm_lock, flags);
 	au1000_calibrate_delay();
 	restore_local_and_enable(0, intc0_mask);