sensors: remove the write permisson of sensor class sysfs

The sensor class device sysfs interface shall be read-only. So
remove the write permisson of these interface.

Change-Id: Ifd763247891f39e2ae7f2ce04f8ffe505c1bebe8
Signed-off-by: Jie Cheng <rockiec@codeaurora.org>
1 file changed