MFC b8051298b0a3:
Fix missing value in uar_page field for ratelimit in mlx5en(4).
This is a regression issue after the new UAR API was introduced
by f8f5b459d21e .

Sponsored by: Mellanox Technologies // NVIDIA Networking

(cherry picked from commit b8051298b0a345ae0bdfcd2ddf89bca1b96c6c2a)