flashcp: trivial code shrink

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
testsuite/du/du-k-works: fix false positive

Signed-off-by: Kang Kai <kai.kang@windriver.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
udhcpc6: fix port numbers used if !FEATURE_UDHCP_PORT

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Merge remote-tracking branch 'bb/master' into sm-jb-mr1-wip