[PPC] Make mac-io ata interrupts depend on local, not global index

In commit r680 I incorrectly made the interrupt number of the mac-io ata
device depend on its global index. Of course the interrupt only depends on
its index inside the mac-io chip.

So let's fix that up and make Qemu's oldworld emulation work again!

Signed-off-by: Alexander Graf <agraf@suse.de>

git-svn-id: svn://coreboot.org/openbios/trunk/openbios-devel@721 f158a5a8-5612-0410-a976-696ce0be7e32

drivers/ide.c

@@ -1582,16 +1582,16 @@ int macio_ide_init(const char *path, uint32_t addr, int nb_channels)
 
 		/* The first interrupt entry is the ide interrupt, the second
 		   the dbdma interrupt */
-		switch (current_channel) {
-		case 1:
+		switch (i) {
+		case 0:
 			props[0] = 0x0000000d;
 			props[2] = 0x00000002;
 			break;
-		case 2:
+		case 1:
 			props[0] = 0x0000000e;
 			props[2] = 0x00000003;
 			break;
-		case 3:
+		case 2:
 			props[0] = 0x0000000f;
 			props[2] = 0x00000004;
 			break;