Three attributes are currently defined for the Blackfin.
l1_datal1_data_Al1_data_Bl1_data attribute are put into the specific section
named .l1.data. Those with l1_data_A attribute are put into
the specific section named .l1.data.A. Those with l1_data_B
attribute are put into the specific section named .l1.data.B.
l2l2 attribute are put into the specific section
named .l2.data.