ide: it8213 IDE driver update (version 2)

* set ATAPI/IORDY/TIME bits correctly in it8213_tuneproc()
* fix UDMA/MWDMA/SWDMA masks in it8213_init_hwif()
* in it8213_tune_chipset() SWDMA2 mode should be used instead of MWDMA0
* backport various fixes from piix/slc90e66 drivers:
  - in it8213_tuneproc() the highest possible PIO mode is PIO4 (not PIO5)
  - clear ATAPI/IORDY/TIME bits before setting them also for slave device
  - use ->speedproc in it8213_config_drive_for_dma()
  - don't try to tune PIO in config_chipset_for_pio()
  - simplify is_slave calculation in it8213_tuneproc()
  - misc cleanups
* fix it8213_ratemask() and it8213_tuneproc() comments
* simplify it8213_init_hwif()
* remove init_chipset_it8213()
* add missing Copyrights and update MODULE_AUTHOR()
* CodingStyle cleanups
* remove dead code

v2:
* PCI_DEVICE_ID_ITE_8213 is only defined in -mm kernels,
  so just use PCI Device ID (0x8213) directly
* fix ->ultra_mask incorrectly changed to 0x3f in v1 version of the patch

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>

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