[POWERPC] Reworked interrupt numbers for OpenPIC based Freescale chips

Make the interrupt numbers match the OpenPIC spec intead of the
Freescale docs which distinguish between internal and external interrupts.

Now we can use the interrupt number directly to find the register offset
associated with it.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
diff --git a/arch/powerpc/platforms/85xx/mpc85xx_ads.c b/arch/powerpc/platforms/85xx/mpc85xx_ads.c
index 1262d1b..7235f70 100644
--- a/arch/powerpc/platforms/85xx/mpc85xx_ads.c
+++ b/arch/powerpc/platforms/85xx/mpc85xx_ads.c
@@ -87,30 +87,10 @@
 
 	mpic = mpic_alloc(np, r.start,
 			MPIC_PRIMARY | MPIC_WANTS_RESET | MPIC_BIG_ENDIAN,
-			4, 0, " OpenPIC  ");
+			0, 256, " OpenPIC  ");
 	BUG_ON(mpic == NULL);
 	of_node_put(np);
 
-	mpic_assign_isu(mpic, 0, r.start + 0x10200);
-	mpic_assign_isu(mpic, 1, r.start + 0x10280);
-	mpic_assign_isu(mpic, 2, r.start + 0x10300);
-	mpic_assign_isu(mpic, 3, r.start + 0x10380);
-	mpic_assign_isu(mpic, 4, r.start + 0x10400);
-	mpic_assign_isu(mpic, 5, r.start + 0x10480);
-	mpic_assign_isu(mpic, 6, r.start + 0x10500);
-	mpic_assign_isu(mpic, 7, r.start + 0x10580);
-
-	/* Unused on this platform (leave room for 8548) */
-	mpic_assign_isu(mpic, 8, r.start + 0x10600);
-	mpic_assign_isu(mpic, 9, r.start + 0x10680);
-	mpic_assign_isu(mpic, 10, r.start + 0x10700);
-	mpic_assign_isu(mpic, 11, r.start + 0x10780);
-
-	/* External Interrupts */
-	mpic_assign_isu(mpic, 12, r.start + 0x10000);
-	mpic_assign_isu(mpic, 13, r.start + 0x10080);
-	mpic_assign_isu(mpic, 14, r.start + 0x10100);
-
 	mpic_init(mpic);
 
 #ifdef CONFIG_CPM2