staging: dgap: remove useless dgap_probe1() function

The dgap_probe1() function is just calling dgap_found_board().
So it is removed and dgap_found_board() is called directly.

Signed-off-by: Daeseok Youn <daeseok.youn@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>