buildroot

linux-firmware: fix install for Chelsio T[45]

It's broken for the last 3 version bumps, since
1c9846ecc9 "linux-firmware: Bump to the latest version"

Fix it by updating the name of the file to install.
Do not use * since it would install also old versions that would take
1MB extra space in the target.

A comment to remember to update the file name when bumping the package
is not needed because a previous patch in the series makes the build
to fail for missing file.

Signed-off-by: Ricardo Martincoski <ricardo.martincoski@gmail.com>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Peter Korsgaard <peter@korsgaard.com>
Cc: Peter Seiderer <ps.report@gmx.net>
Cc: Yann E. MORIN <yann.morin.1998@free.fr>
Cc: Yegor Yefremov <yegorslists@googlemail.com>
Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>