LU-10129 lnd: set device capabilities

LU-10129 lnd: set device capabilities

MLX-4, MLX-5 and OPA support different capabilities. Query the
device and cache the capabilities of the device for future use.

MLX5 can support fast registration and gaps
MLX4 and OPA only support FMR

Test-Parameters: trivial
Signed-off-by: Amir Shehata <amir.shehata@intel.com>
Change-Id: I70d468f8af52d263139e7b51341bf4b5150b89c1
Reviewed-on: https://review.whamcloud.com/30309
Reviewed-by: Alexey Lyashkov <c17817@cray.com>
Tested-by: Jenkins
Tested-by: Maloo <hpdd-maloo@intel.com>
Reviewed-by: Dmitry Eremin <dmitry.eremin@intel.com>
Reviewed-by: James Simmons <uja.ornl@yahoo.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>