msm: thermal: Fix kernel thermal sysfs nodes permission

Fix the permission of the sysfs nodes exposed by the kernel
thermal monitor (KTM).The KTM sysfs nodes had wrong permissions
defined, which restricted access to thermal-engine/thermald with
SELinux policy. The sysfsnodes permissions are fixed in order to
allow access to thermal userspace processes with SELinux policy.

Bug: 12450712

Change-Id: I6f088f0bca889acbf0fd6a1d1dac09edc89c366c
Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>
Signed-off-by: Mekala Natarajan <mekalan@codeaurora.org>