Perftest fails when declaring support for MW_TYPE_2A

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Hi Mellanox/ Accelio, 

There is a very old commit in perftest 96050b8b that assumes bit 23 in device cap flags 
means there is driver support for contiguous buffer allocation of user data

There is a clash with the following device capability defined in libibverbs/verbs.h: 
#define IBV_DEVICE_MEM_WINDOW_TYPE_2A = 1 << 23

Once driver advertises memory window type 2a capability, the perftest application fails. 

I found that IB_DEVICE_MR_ALLOCATE is defined as bit 23 for freebsd git hub and accelio github
And then I saw there are a lot of clashes between ib_verbs + upstream kernel

Clash between the two needs to be resolved. 
Perftest wise: Perhaps an additional parameter to perftest ? 

Please advise, 
Thanks,
Michal
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