RDMA/mlx5: Fix typo in enum name

Nnothing uses the enum name, so this is harmless.

Fixes: 32269441 ("IB/mlx5: Introduce driver create and destroy flow methods")
Link: https://lore.kernel.org/r/20200724084112.GC31930@amd


Signed-off-by: Pavel Machek (CIP) <pavel@denx.de>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>