t0lte: prevent freeze on smart dock plug

Bug https://jira.cyanogenmod.org/browse/CYAN-2419

Could be applied on GT-I9305 and N7100 after tests.

Change-Id: I9bd094f0f672fa67c7a36ec52e1133afe6b06c8d
Merge branch 'cm-10.2' into martincz