ide: add ide_pio_cycle_time() helper (take 2)

* Add ide_pio_cycle_time() helper.

* Use it in ali14xx/ht6560b/qd65xx/cmd64{0,x}/sl82c105 and pmac host drivers
  (previously cycle time given by the device was only used for "pio" == 255).

* Remove no longer needed ide_pio_data_t.cycle_time field.

v2:
* Fix "ata_" prefix (Noticed by Jeff).

Acked-by: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: Jeff Garzik <jeff@garzik.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
diff --git a/drivers/ide/ppc/pmac.c b/drivers/ide/ppc/pmac.c
index e46f4720..6693305 100644
--- a/drivers/ide/ppc/pmac.c
+++ b/drivers/ide/ppc/pmac.c
@@ -615,24 +615,25 @@
 static void
 pmac_ide_tuneproc(ide_drive_t *drive, u8 pio)
 {
-	ide_pio_data_t d;
 	u32 *timings;
 	unsigned accessTicks, recTicks;
 	unsigned accessTime, recTime;
 	pmac_ide_hwif_t* pmif = (pmac_ide_hwif_t *)HWIF(drive)->hwif_data;
-	
+	unsigned int cycle_time;
+
 	if (pmif == NULL)
 		return;
 		
 	/* which drive is it ? */
 	timings = &pmif->timings[drive->select.b.unit & 0x01];
 
-	pio = ide_get_best_pio_mode(drive, pio, 4, &d);
+	pio = ide_get_best_pio_mode(drive, pio, 4, NULL);
+	cycle_time = ide_pio_cycle_time(drive, pio);
 
 	switch (pmif->kind) {
 	case controller_sh_ata6: {
 		/* 133Mhz cell */
-		u32 tr = kauai_lookup_timing(shasta_pio_timings, d.cycle_time);
+		u32 tr = kauai_lookup_timing(shasta_pio_timings, cycle_time);
 		if (tr == 0)
 			return;
 		*timings = ((*timings) & ~TR_133_PIOREG_PIO_MASK) | tr;
@@ -641,7 +642,7 @@
 	case controller_un_ata6:
 	case controller_k2_ata6: {
 		/* 100Mhz cell */
-		u32 tr = kauai_lookup_timing(kauai_pio_timings, d.cycle_time);
+		u32 tr = kauai_lookup_timing(kauai_pio_timings, cycle_time);
 		if (tr == 0)
 			return;
 		*timings = ((*timings) & ~TR_100_PIOREG_PIO_MASK) | tr;
@@ -649,7 +650,7 @@
 		}
 	case controller_kl_ata4:
 		/* 66Mhz cell */
-		recTime = d.cycle_time - ide_pio_timings[pio].active_time
+		recTime = cycle_time - ide_pio_timings[pio].active_time
 				- ide_pio_timings[pio].setup_time;
 		recTime = max(recTime, 150U);
 		accessTime = ide_pio_timings[pio].active_time;
@@ -665,7 +666,7 @@
 	default: {
 		/* 33Mhz cell */
 		int ebit = 0;
-		recTime = d.cycle_time - ide_pio_timings[pio].active_time
+		recTime = cycle_time - ide_pio_timings[pio].active_time
 				- ide_pio_timings[pio].setup_time;
 		recTime = max(recTime, 150U);
 		accessTime = ide_pio_timings[pio].active_time;