[PATCH] IDE 93

[PATCH] IDE 93

 - Revert patch number 92. It turned out to be broken behind hope.  Personally I
   attribute this to the recent heat wave over here and apologize for the
   problems this may have caused. Turned out that my note about the change
   beeing dnagerous in the last change log was more then true...

 - Locking issues for ioctl handling.

 - Remove waiting_for_dma bit field. Use IDE_DMA bit flag instead.
   Apply this bit globally and not in the corresponding implementation
   functions.