linux-firmware: update to version 20161206 (#5311)

With this update, my screen is no longer flickering when used with a rx480 gpu.

srcpkgs/linux-firmware/template

@@ -1,6 +1,6 @@
 # Template file for 'linux-firmware'
 pkgname=linux-firmware
-version=20160623
+version=20161206
 revision=1
 noarch=yes
 short_desc="Binary firmware blobs for the Linux kernel"
@@ -11,7 +11,7 @@ hostmakedepends="git"
 depends="${pkgname}-amd-${version}_${revision} ${pkgname}-network-${version}_${revision}"
 
 do_fetch() {
-	local _githash=dca884016afa9f954baa69e3e28b8f2aab3b6921
+	local _githash=4b9559fb0565f582a21a4070a81a3b6a7d77610b
 	local _url="git://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git"
 	git clone ${_url} ${wrksrc}
 	cd ${wrksrc}