[PATCH] uml ubd driver: var renames

Rename the ubd_dev array to ubd_devs and then call any "struct ubd" ubd_dev
instead of dev, which doesn't make clear what we're treating (and no, it's not
hungarian notation - not any more than calling all vm_area_struct vma or all
inodes inode).
Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>