slc90e66: carry over fixes from piix driver
slc90e66: carry over fixes from piix driver

Synchronize with version 0.46 of the Intel PIIX/ICH driver:

- carry over Alan's and my own fixes in the tuneproc() method and my cleanups
  both there and in the ratemask() method;

- SLC90E66 only supports MW DMA modes 1/2 and SW DMA mode 2 (just like Intel
  chips), so don't claim support for other MW/SW DMA modes;

- don't check dor non-NULL drive->id in the ide_dma_check() method -- this is
  assumed to be true in all other drivers;

- do some coding/formatting cleanups while at it...

Signed-off-by: Sergei Shtylyov <38a867ea26f35d3eeb42270f1bc7b9d1d135e6a2@ru.mvista.com>
Cc: Alan Cox <91e38e63b890fbb214c8914809fde03c73e7f24d@lxorguk.ukuu.org.uk>
Signed-off-by: Andrew Morton <5c1e68b099950c134891f0b6e179498a8ebe9cf9@osdl.org>
Signed-off-by: Bartlomiej Zolnierkiewicz <248de9df611a028e5eceb9d893a2ed6c24c89ef4@gmail.com>

KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas,KristFoundation/Programs,KristFoundation/Programs,TeamVee-Kanas/android_kernel_samsung_kanas