Merge branch 'u-boot-net-20250212' of https://source.denx.de/u-boot/custodians/u-boot-net

CI: https://source.denx.de/u-boot/custodians/u-boot-net/-/pipelines/24577

net-lwip:
* Fix incorrect selection of ethernet device on boards having more than
  one
* Fix TFTP option processing
* Make the WGET_HTTPS Kconfig symbol depend on DM_RNG

lib:
* Add strnstr()