m68knommu: external interrupt support to ColdFire intc-simr controller

The EDGE Port module of some ColdFire parts using the intc-simr interrupt
controller provides support for 7 external interrupts. These interrupts
go off-chip (that is they are not for internal peripherals). They need
some special handling and have some extra setup registers. Add code to
support them.

Signed-off-by: Greg Ungerer <gerg@uclinux.org>

arch/m68k/include/asm/m520xsim.h

@@ -63,9 +63,12 @@
 /*
  * EPORT and GPIO registers.
  */
+#define MCFEPORT_EPPAR			0xFC088000
 #define MCFEPORT_EPDDR			0xFC088002
+#define MCFEPORT_EPIER			0xFC088003
 #define MCFEPORT_EPDR			0xFC088004
 #define MCFEPORT_EPPDR			0xFC088005
+#define MCFEPORT_EPFR			0xFC088006
 
 #define MCFGPIO_PODR_BUSCTL		0xFC0A4000
 #define MCFGPIO_PODR_BE			0xFC0A4001