[MIPS] RM: Collected changes

- EISA support for non PCI RMs (RM200 and RM400-xxx). The major part
  is the splitting of the EISA and onboard ISA of the RM200, which
  makes the EISA bus on the RM200 look like on other RMs.
- 64bit kernel support
- system type detection is now common for big and little endian
- moved sniprom code to arch/mips/fw
- added call_o32 function to arch/mips/fw/lib, which uses a private
  stack for calling prom functions
- fix problem with ISA interrupts, which makes using PIT clockevent
  possible

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/sni/irq.c b/arch/mips/sni/irq.c
index 9ccffdf..e8e72bb 100644
--- a/arch/mips/sni/irq.c
+++ b/arch/mips/sni/irq.c
@@ -35,14 +35,14 @@
 	if (unlikely(irq < 0))
 		return IRQ_NONE;
 
-	do_IRQ(irq);
+	generic_handle_irq(irq);
 	return IRQ_HANDLED;
 }
 
 struct irqaction sni_isa_irq = {
 	.handler = sni_isa_irq_handler,
 	.name = "ISA",
-	.flags = IRQF_SHARED
+	.flags = IRQF_SHARED | IRQF_DISABLED
 };
 
 /*