No, Stratix II devices do not support drive strength of 24mA in I/O banks 1, 2, 5 and 6. For these banks, the I/O buffers are designed to have additional capability for LVDS applications and do not have higher drive strength.
The drive strength for 3.3V LVTTL in the above mentioned I/O banks are 12, 8 and 4mA; 12mA being the default drive strength.
The drive strength for 3.3V LVCMOS in the above mentioned I/O banks are 8 and 4mA; 8mA being the default drive strength.