Here we introduce logic in alps_identify to set the ALPS_DUALPOINT flag
for touchpad hardware responding to E7 report with 73 03 28, as is found
in the Dell Latitude E7470.
Tested-by: NMichal Hocko <mhocko@suse.com>
Signed-off-by: NBen Gamari <ben@smart-cactus.org>
Signed-off-by: NDmitry Torokhov <dmitry.torokhov@gmail.com>