dts: arm64: imx8mq-librem5: describe the battery with simple-battery

2 jobs for max-upstream in 65 minutes and 32 seconds (queued for 38 minutes and 59 seconds)
Status Job ID Name Coverage
  Build
passed #356047
librem5
build:aarch64

00:23:40

passed #356048
librem5:arm64
build:deb

01:05:32