[PATCH] Speedtouch resync after lost signal.

There's a bigger Speedtouch update coming your way after 2.6.12 but in
the meantime, let's at least make it automatically resync if the DSL
signal is lost.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>