linux-phytec-ti

Input: bcm5974 - Report button also for zero fingers

With the current code, pressing the integrated button with an
isolating tool does not result in any button report. Fixed
with this this patch.

Signed-off-by: Henrik Rydberg <rydberg@euromail.se>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>