MIPS: lantiq: Remove unnecessary include of <linux/of_irq.h>

arch/mips/pci/fixup-lantiq.c requires nothing from <linux/of_irq.h>, so
remove the include of it.

Signed-off-by: Bjorn Helgaas <[email protected]>
Reviewed-by: Philippe Mathieu-Daudé <[email protected]>
Signed-off-by: Thomas Bogendoerfer <[email protected]>

Author: bjorn-helgaas

arch/mips/pci/fixup-lantiq.c

@@ -4,7 +4,6 @@
  *  Copyright (C) 2012 John Crispin <[email protected]>
  */
 
-#include <linux/of_irq.h>
 #include <linux/of_pci.h>
 #include <linux/pci.h>