ide: move ide_pio_cycle_time() to ide-timings.c

All ide_pio_cycle_time() users already select CONFIG_IDE_TIMINGS
so move the function from ide-lib.c to ide-timings.c.

While at it:

- convert ide_pio_cycle_time() to use ide_timing_find_mode()

- cleanup ide_pio_cycle_time() a bit

There should be no functional changes caused by this patch.

Acked-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 057001f..3899c76 100644
--- a/include/linux/ide.h
+++ b/include/linux/ide.h
@@ -1300,6 +1300,7 @@
 };
 
 struct ide_timing *ide_timing_find_mode(u8);
+u16 ide_pio_cycle_time(ide_drive_t *, u8);
 void ide_timing_merge(struct ide_timing *, struct ide_timing *,
 		      struct ide_timing *, unsigned int);
 int ide_timing_compute(ide_drive_t *, u8, struct ide_timing *, int, int);
@@ -1311,7 +1312,6 @@
 				/* active + recovery (+ setup for some chips) */
 } ide_pio_timings_t;
 
-unsigned int ide_pio_cycle_time(ide_drive_t *, u8);
 u8 ide_get_best_pio_mode(ide_drive_t *, u8, u8);
 extern const ide_pio_timings_t ide_pio_timings[6];