Buildroot commit 1738b5582b, which
switched _SOURCE to an upstream-provided tarball, forgot to remove the
POST_PATCH_HOOK which adds a file already present in the tarball.
Fixes:
http://autobuild.buildroot.net/results/e4d0c06e3babed6b290b6223a1cf7e4cce38064c/
Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>