net/mlx5: Create a new profile for SFs

Create a new profile for SFs in order to disable the command cache.
Each function command cache consumes ~500KB of memory, when using a
large number of SFs this savings is notable on memory constarined
systems.

Use a new profile to provide for future differences between SFs and PFs.

The mr_cache not used for non-PF functions, so it is excluded from the
new profile.

Signed-off-by: Parav Pandit <parav@mellanox.com>
Reviewed-by: Bodong Wang <bodong@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>