greybus: firmware: s/should/must

Replace 'should' with 'must' to clear the expectation a bit more.

Reported-by: Alex Elder <alex.elder@linaro.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
1 file changed
tree: 73f0f8f32533915fda71f9afeb25fe4ef2ab486e
  1. drivers/