linux/hayesesp.h got removed in 2.6.33, but some archs (like x86) still
define the TIOCGHAYESESP ioctl, breaking the build.
It's very unlikely to be of interest anymore, so just undef it.
Reported-by: Paulius Zaleckas <paulius.zaleckas@gmail.com>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>
