[POWERPC] 85xx: sbc8548 - Fix incorrect PCI-X and PCI interrupt map

The following patch allows interrupts to occur on the
sbc8548. Currently PCI and PCI-X devices get assigned an IRQ
but the interrupt count never increases.  This solves the
problem and adds PCI support as well.
Signed-off-by: NJeremy McNicoll <jeremy.mcnicoll@windriver.com>
Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>

arch/powerpc/boot/dts/sbc8548.dts

@@ -184,11 +184,17 @@
 		cell-index = <0>;
 		interrupt-map-mask = <0xf800 0x0 0x0 0x7>;
 		interrupt-map = <
-			/* IDSEL 0x01 (PCI-X slot) */
-			0x0800 0x0 0x0 0x1 &mpic 0x0 0x1
-			0x0800 0x0 0x0 0x2 &mpic 0x1 0x1
-			0x0800 0x0 0x0 0x3 &mpic 0x2 0x1
-			0x0800 0x0 0x0 0x4 &mpic 0x3 0x1>;
+			/* IDSEL 0x01 (PCI-X slot) @66MHz */
+			0x0800 0x0 0x0 0x1 &mpic 0x2 0x1
+			0x0800 0x0 0x0 0x2 &mpic 0x3 0x1
+			0x0800 0x0 0x0 0x3 &mpic 0x4 0x1
+			0x0800 0x0 0x0 0x4 &mpic 0x1 0x1
+
+			/* IDSEL 0x11 (PCI, 3.3V 32bit) @33MHz */
+			0x8800 0x0 0x0 0x1 &mpic 0x2 0x1
+			0x8800 0x0 0x0 0x2 &mpic 0x3 0x1
+			0x8800 0x0 0x0 0x3 &mpic 0x4 0x1
+			0x8800 0x0 0x0 0x4 &mpic 0x1 0x1>;
 
 		interrupt-parent = <&mpic>;
 		interrupts = <0x18 0x2>;