ide: make void and rename ide_dma_lostirq() method

Since ide_dma_lostirq() method's result is discarded, make it return 'void'.
While at it, rename the method to dma_lost_irq(), drop the '__' prefix from the
default method's name, and do some cleanups in this method driver-wise:

- in aec62xx.c, rename the method in accordance with other drivers, and get rid
  of unnecessary variables there;

- in pdc202xx_old.c, define/use 'hwif' variable;

- in sgiioc4.c, rearrange the code to call the resetproc() method directly.

Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/include/linux/ide.h b/include/linux/ide.h
index 1e365ac..d7f74e7 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -735,7 +735,7 @@
 	void (*ide_dma_clear_irq)(ide_drive_t *drive);
 	void (*dma_host_on)(ide_drive_t *drive);
 	void (*dma_host_off)(ide_drive_t *drive);
-	int (*ide_dma_lostirq)(ide_drive_t *drive);
+	void (*dma_lost_irq)(ide_drive_t *drive);
 	int (*ide_dma_timeout)(ide_drive_t *drive);
 
 	void (*OUTB)(u8 addr, unsigned long port);
@@ -1304,7 +1304,7 @@
 extern int ide_dma_setup(ide_drive_t *);
 extern void ide_dma_start(ide_drive_t *);
 extern int __ide_dma_end(ide_drive_t *);
-extern int __ide_dma_lostirq(ide_drive_t *);
+extern void ide_dma_lost_irq(ide_drive_t *);
 extern int __ide_dma_timeout(ide_drive_t *);
 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */