- Correct some silly errors (dereferencing a pointer before checking if it's
  != NULL when creating /proc/sysemu, some error messages)

- separate using_sysemu from sysemu_supported (so to refuse to activate
  sysemu if it is not supported, avoiding panics)

- not probe sysemu if in tt mode.

Signed-off-by: <blaisorblade_spam@yahoo.it>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>