WCN6855 exists in 2 HW revisions, but both use the same FW so upstream
just has a symlink for hw2.1 to hw2.0 that I forgot to make.
Fixes: b4d3694f81f4 ("linux-firmware: package ath11k consumer cards firmware")
Signed-off-by: Robert Marko <robimarko@gmail.com>