msm: lmh_lite: Return error on disabling a throttling sensor

Return error when sensor polling is disabled when
it is still throttling. This case can occur due
to a race condition between the sensor value read
and sensor throttling value update.

Change-Id: I1e9a9fa97e0e4221752208cf139df05d6eedccbf
Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>