When using devupstream class the SRCREV_FORMAT variable must be set.
(From OE-Core rev: 5d27db85d269f576929fd3c81f94e54d894cdf69)
Signed-off-by: Daniel Gomez <daniel@qtec.com>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>