scripts/make-release: Stop shipping u-boot source as a tarball

In commit d0dead3b6d we changed to shipping the u-boot
sources as a tarball, to work around a problem where they
contained a file and directory that had the same name except
for case, which was preventing QEMU's source tarball being
unpacked on case-insensitive filesystems.

In commit f2a3b549e3 we updated our u-boot blob
and sources to v2019.01, which no longer has this problem,
so we can finally remove our workaround (effectively
reverting d0dead3b6d).

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Message-id: 20190314155628.8822-1-peter.maydell@linaro.org

scripts/make-release

@@ -20,10 +20,6 @@ git checkout "v${version}"
 git submodule update --init
 (cd roms/seabios && git describe --tags --long --dirty > .version)
 (cd roms/skiboot && ./make_version.sh > .version)
-# FIXME: The following line is a workaround for avoiding filename collisions
-# when unpacking u-boot sources on case-insensitive filesystems. Once we
-# update to something with u-boot commit 610eec7f0 we can drop this line.
-tar --exclude=.git -cjf roms/u-boot.tar.bz2 -C roms u-boot && rm -rf roms/u-boot
 popd
 tar --exclude=.git -cjf ${destination}.tar.bz2 ${destination}
 rm -rf ${destination}