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/legacy/buddha.c b/drivers/ide/legacy/buddha.c
index 8b9cb39..ba64c4b 100644
--- a/drivers/ide/legacy/buddha.c
+++ b/drivers/ide/legacy/buddha.c
@@ -156,6 +156,8 @@
 
 	while ((z = zorro_find_device(ZORRO_WILDCARD, z))) {
 		unsigned long board;
+		u8 idx[4] = { 0xff, 0xff, 0xff, 0xff };
+
 		if (z->id == ZORRO_PROD_INDIVIDUAL_COMPUTERS_BUDDHA) {
 			buddha_num_hwifs = BUDDHA_NUM_HWIFS;
 			type=BOARD_BUDDHA;
@@ -233,8 +235,12 @@
 					printk("X-Surf");
 					break;
 				}
-				printk(" IDE interface\n");	    
-			}		      
+				printk(" IDE interface\n");
+
+				idx[i] = index;
+			}
 		}
+
+		ide_device_add(idx);
 	}
 }