timing: partly revert #195a1bf8 for output format

as discussed with @faverge and @viroulea, here a request to reset the output format as it was before merge #195a1bf8 Thanks!

assigned to @viroulea

Thanks, the output seems to look like before:

# CHAMELEON 1.0.0, ./timing/time_dpotrf_tile
# Nb threads: 2
# Nb GPUs:    0
# NB:         320
# IB:         32
# eps:        1.110223e-16
#
#     M       N  K/NRHS   seconds   Gflop/s Deviation
   1024    1024       1     0.134      2.68 +-   0.00  

merged

mentioned in commit 1f14c6b2