net/mlx5_core: remove unused including <generated/utsrelease.h>

Remove including <generated/utsrelease.h> that don't need it.

Fixes: 17a7612b

 ("net/mlx5_core: Clean driver version and name")
Signed-off-by: Zou Wei <zou_wei@huawei.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>