dts: fix RT-AC58U to match the updated device tree name/alias changes.

A variety of subtle changes occured with the upstream syncs over time.

This allows the RT-AC58U to boot and have working USB3.

Locally tested:

• Asus RT-AC58U, USB3 (umass)

Differential Revision: https://reviews.freebsd.org/D49685
Reviewed by: manu