backport a patch which fixing warnings with gcc7
(From OE-Core rev: 9c75151116aa293dc8567c237d7e4da5bdec90e3)
Signed-off-by: Khem Raj <raj.khem@gmail.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
(cherry picked from commit 74fb6043f6d74b84f7efc282ac6cfc54fcb71882)
Fixed up patch to apply agains this version
Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>