LU-15189 lnet: fix memory mapping.

LU-15189 lnet: fix memory mapping.

Nvidia GDS have a bug which caused incorrect page type detect.
It may return an GPU flag for the kmalloc buffer (ptlrpc_message
in my case).
To workaround this - Whamcloud have both mapping calls, but it's
costly and caused an extra RDMA operations as ko2iblnd trust
an msg_rdma_force flag.
Lets drop extra Nvidia calls and check just an real "user" pages
or GPU flag.

HPe-bug-id: LUS-10520
Signed-off-by: Alexey Lyashkov <alexey.lyashkov@hpe.com>
Change-Id: I5d70c5e0630b0f16e130a7db0385de2443c11a63
Reviewed-on: https://review.whamcloud.com/45482
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Alexander Boyko <alexander.boyko@hpe.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>