[PATCH pata-2.6] sl82c105: rework PIO support (take 2)

[Bartlomiej Zolnierkiewicz]

On Wednesday 28 March 2007, Sergei Shtylyov wrote:
> Get rid of the 'pio_speed' member of 'ide_drive_t' that was only used by this
> driver by storing the PIO mode timings in the 'drive_data' instead -- this
> allows us to greatly  simplify the process of "reloading" of the chip's timing
> register and do it right in sl82c150_dma_off_quietly() and to get rid of two
> extra arguments to config_for_pio() -- which got renamed to sl82c105_tune_pio()
> and now returns a PIO mode selected, with ide_config_drive_speed() call moved
> into the tuneproc() method, now called sl82c105_tune_drive() with the code to
> set drive's 'io_32bit' and 'unmask' flags in its turn moved to its proper place
> in the init_hwif() method.
> Also, while at it, rename get_timing_sl82c105() into get_pio_timings() and get
> rid of the code in it clamping cycle counts to 32 which was both incorrect and
> never executed anyway...
> 
> Signed-off-by: Sergei Shtylyov <sshtylyov at ru.mvista.com>
> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier at gmail.com>

applied