What's the maximum input current of 3.3V LVTTL for Cyclone4?

It seems like you misunderstood the meaning of the maximum input current rating. In normal operation, when driven from a 3.3V driver, the FPGA input current, with or without PCI diode, is about zero, except for uA level leakage currents. PCI diodes are placed to clamp dynamical signal overshoots, the 10 mA rating specifies the allowed current when continuously drving the input from an output of higher output level.

When designing series termination, you can assume zero input current of LVCMOS/LVTTL FPGA inputs. External chips can have an input current if they are fabricated in bipolar technlogy, but these days, most are CMOS as well.