net/mlx5: Align ODP capability function with netdev coding style

Update newly introduced function to be aligned to netdev coding style.

Fixes: 46861e3e

 ("net/mlx5: Set ODP SRQ support in firmware")
Reported-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>