Leave the speaker muted by default for the usbhost device tree

2 jobs for imx8-4.18-wip in 48 minutes and 37 seconds (queued for 33 seconds)
Status Job ID Name Coverage
  Build
passed #10537
librem5
build:aarch64:Image

00:48:37

passed #10538
librem5
build:aarch64:deb

00:34:38