net/mlx5: Add reset_state field to MFRL register

Add new field reset_state to MFRL register. This field expose current
state of sync reset for fw update. This field enables sharing with the
user more details on why fw activate failed in case it failed the sync
reset stage.

Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>