a) added embedded thread_info [m68k processor.h]

b) added missing symbols in asm-offsets.c

c) task_thread_info() and friends in asm-m68k/thread_info.h

d) made m68k thread_info.h included by m68k processor.h, not the other way
   round.

Signed-off-by: Al Viro <viro@parcelfarce.linux.theplanet.co.uk>
Signed-off-by: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>