msm_thermal: Remove error messages from log when core is offline

If msm_thermal is not cancelled and TSENS reports a high temperature,
it might try to limit the frequency, but since the core is offline,
the frequency limit may not happen. We need not report this error.

Change-Id: I579e2329c6fb038d53f2d207a6a832185e633785
Signed-off-by: Praveen Chidambaram <pchidamb@codeaurora.org>
Signed-off-by: David Brown <davidb@codeaurora.org>