input: sensor: remove open/close function from lis3dh driver

This is to make lis3dh accelerometer disabled by default, even if it
is open-ed by user space. Device will have to be explicitely enabled
via sysfs attribute.

Change-Id: I0fb022fac7f05aa7606717c58425fe3ed1c458b0
Signed-off-by: Wentao Xu <wentaox@codeaurora.org>