build from: 8a4c72 Add A/B boot support update feature: Add A/B boot support. Signed-off-by: Chen Fen <chenfen@rock-chips.com> Change-Id: Ied734691f09444ab3b2b795a36586ed10a613ce0
build from: 8a4c72 Add A/B boot support update feature: Add A/B boot support. Signed-off-by: Chen Fen <chenfen@rock-chips.com> Change-Id: Ied734691f09444ab3b2b795a36586ed10a613ce0