net/mlx5e: Remove the duplicating check for striding RQ when enabling LRO

LRO requires striding RQ and checks that it's enabled at two places:
mlx5e_fix_features and set_feature_lro. This commit keeps only one check
at mlx5e_fix_features and removes the duplicating one in
set_feature_lro.

Signed-off-by: Maxim Mikityanskiy <maximmi@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>