package/brcmfmac_sdio-firmware-rpi: support riscv architecture
These firmware files are also applicable to some Riscv hosts.
Simply remove the architecture dependency. The intention was to only
show it for RaspberryPi, but that's half-baked anyway.
Signed-off-by: Christian Stewart <christian@paral.in>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>