ide: make void and rename ide_dma_timeout() method

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

- in ide-dma.c, au1xxx-ide.c, and pdc202xx_old.c, define/use 'hwif' variable;

- in au1xxx-ide.c, get rid of commented out printk();

- in sl82c105.c, get rid of unnecessary variables.

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 d7f74e7..0bacf7f 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -736,7 +736,7 @@
 	void (*dma_host_on)(ide_drive_t *drive);
 	void (*dma_host_off)(ide_drive_t *drive);
 	void (*dma_lost_irq)(ide_drive_t *drive);
-	int (*ide_dma_timeout)(ide_drive_t *drive);
+	void (*dma_timeout)(ide_drive_t *drive);
 
 	void (*OUTB)(u8 addr, unsigned long port);
 	void (*OUTBSYNC)(ide_drive_t *drive, u8 addr, unsigned long port);
@@ -1305,7 +1305,7 @@
 extern void ide_dma_start(ide_drive_t *);
 extern int __ide_dma_end(ide_drive_t *);
 extern void ide_dma_lost_irq(ide_drive_t *);
-extern int __ide_dma_timeout(ide_drive_t *);
+extern void ide_dma_timeout(ide_drive_t *);
 #endif /* CONFIG_BLK_DEV_IDEDMA_PCI */
 
 #else