PLCgen: I/O table entry address size is always checked against target's max integer size

Method org.eclipse.escet.cif.plcgen.targets.PlcBaseTarget.verifyIoTableEntry always checks the size of the parsed address against the result of getMaxIntegerTypeSize of the target. But, for a real-typed I/O table entry, it should check against the maximum real type size of the target. So, the method should be adapted to take into account the type of the I/O table entry.