librem5_defconfig: make the USB config more similar to Debian

2 jobs for usb_config_updates in 70 minutes and 19 seconds (queued for 3 minutes and 6 seconds)
Status Job ID Name Coverage
  Build
passed #364141
librem5
build:aarch64

00:57:04

passed #364142
librem5:arm64
build:deb

01:10:13