Hints for firmware-brcm80211 in non-free

Hints

• asv-driver-firmware-description-missing
  firmware-brcm80211.metainfo.xml -
  It is recommended to add a long description to this component to present it better to users.
• asv-summary-has-dot-suffix
  firmware-brcm80211.metainfo.xml:5 - Binary firmware for wireless network cards supported by the brcmsmac or brcmfmac driver.
  The component summary should not end with a dot (`.`).