These are the latest nvram files for brcmfmac, a mac80211 driver for FullMAC Cypress devices. The official location to download brcmfmac files is from linux-firmware: https://git.kernel.org/cgit/linux/kernel/git/firmware/linux-firmware.git
For more information check the wiki: https://wireless.wiki.kernel.org/en/users/drivers/brcm80211#broadcom_brcmfmac_driver