ISDN HISAX hfc_pci big endian support

Hi list,
I have an ISDN PCI card whose driver works fine for little
endian architecuter.default available in the linux src code in the
section drivers/hisax/hfc_pci.c .But when I insert this card in a
bigendian machine it prints:

#error "not running on big endian machines now"

and exits.This statement is present in the above mentioned file.My
question is: Is there a patch already available for this problem?If
anyone has already come across this,could you please share the
solution.

cheers-
kaushal

.