[openib-general] mvapich-gen2 IA64 compile problem

[Roland Dreier]

    > #if defined(_EM64T_)
    > #define DEFAULT_MTU                 (IBV_MTU_2048)
    > #else
    > #define DEFAULT_MTU                 (IBV_MTU_1024)
    > #endif

This is a sticky issue.  This seems fine for now, but what we really
want is something like:

#if MELLANOX_PCI_X_HCA
#define DEFAULT_MTU                 (IBV_MTU_1024)
#else
#define DEFAULT_MTU                 (IBV_MTU_2048)
#endif

But I'm not sure how to handle this.

 - R.