Merge branch 'bng_en-add-link-management-and-statistics-support'

Bhargava Marreddy says:

====================
bng_en: add link management and statistics support

This series enhances the bng_en driver by adding:
1. Link/PHY support
   a. Link query
   b. Async Link events
   c. Ethtool link set/get functionality
2. Hardware statistics reporting via ethtool -S

This version incorporates feedback received prior to splitting the
original series into two parts.
====================

Link: https://patch.msgid.link/20260406180420.279470-1-bhargava.marreddy@broadcom.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>