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

include/uapi/rdma/mlx5_user_ioctl_cmds.h

@@ -263,7 +263,7 @@ enum mlx5_ib_create_flow_attrs {
 	MLX5_IB_ATTR_CREATE_FLOW_FLAGS,
 };
 
-enum mlx5_ib_destoy_flow_attrs {
+enum mlx5_ib_destroy_flow_attrs {
 	MLX5_IB_ATTR_DESTROY_FLOW_HANDLE = (1U << UVERBS_ID_NS_SHIFT),
 };