ide: fix host drivers depending on ide_generic to probe for interfaces (take 2)

* Add mpc8xx_ide_probe() to mpc8xx.c and call it from probe_for_hwifs().

* Convert ide_arm, ide-cris, ide-h8300, ide-pnp, buddha, falconide, gayle,
  macide, q40ide, cmd640 and mpc8xx host drivers to use ide_device_add().

  This removes dependency on ide_generic for these drivers so update
  ide/Kconfig accordingly.

v2:
* ide_arm build fix (s/ide_device_idx/ide_device_add/)
  (Thanks to Christoph Lameter <clameter@sgi.com> for reporting the problem).

Cc: Mikael Starvik <starvik@axis.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/ide-pnp.c b/drivers/ide/ide-pnp.c
index 664bc48..802efd4 100644
--- a/drivers/ide/ide-pnp.c
+++ b/drivers/ide/ide-pnp.c
@@ -43,12 +43,16 @@
 	hwif = ide_find_port(hw.io_ports[IDE_DATA_OFFSET]);
 	if (hwif) {
 		u8 index = hwif->index;
+		u8 idx[4] = { index, 0xff, 0xff, 0xff };
 
 		ide_init_port_data(hwif, index);
 		ide_init_port_hw(hwif, &hw);
 
 		printk(KERN_INFO "ide%d: generic PnP IDE interface\n", index);
 		pnp_set_drvdata(dev,hwif);
+
+		ide_device_add(idx);
+
 		return 0;
 	}