From Peter Chubb

Filesystem migration to possibly 64-bit sector_t:
 - bmap() now takes and returns a sector_t to allow filesystems
   (e.g., JFS, XFS) that are 64-bit clean to deal with large files
 - buffer handling now 64-bit clean

Enable 64-bit sector_t on IA32 and PPC.

kiobufs takes sector_t array, not array of long.
Fix blkmtd.c to deal in such an array.

Miscellaneous fixes for 64-bit sector_t.
 	 - missed printk formats
	 - ide_floppy_do_request had incorrect signature
	 - in blkmtd.c there was a pointer used to
	   manipulate an array to be used by kiobuf --
 	   it was unsigned long, needed to be sector_t