linux-firmware: update, merge in OE classic updates, fix packaging

linux-firmware: update, merge in OE classic updates, fix packaging

Update: move to latest SRCREV, use non-kernel.org URI
Merge: wl12xx symlink + packaging, install all firmwares
Fix: * all entries in PACKAGES are in PROVIDES already
     * A package always RPROVIDES itself
     * A file can only get packaged *once* so only one rtlwifi package will get the license

(From OE-Core rev: 8c7adb66d297ccf9f2f15eb311e5de7d5b07c6df)

Signed-off-by: Koen Kooi <koen@dominion.thruhere.net>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>