thermal: reindex the array in place
thermal: reindex the array in place

There's a keyword for it in set_index(), so don't create a throwaway
data_frame and just change it in place.

sinkap/trappy,ARM-software/trappy,joelagnel/trappy,derkling/trappy,bjackman/trappy,derkling/trappy,derkling/trappy,sinkap/trappy,JaviMerino/trappy,ARM-software/trappy,ARM-software/trappy,bjackman/trappy,bjackman/trappy,JaviMerino/trappy,joelagnel/trappy,joelagnel/trappy,sinkap/trappy,joelagnel/trappy,JaviMerino/trappy,ARM-software/trappy,sinkap/trappy,bjackman/trappy