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PD#SWPL-175733 Problem: need method to validate hdcp1.4 key Solution: add hdcp1.4 key validation method, check aksv loaded from tee contains 20 zeros and 20 ones Verify: s7 Test: DRM-TX-137 Change-Id: I46c6f38d74c61f3edccbb819da0c98f3f9085018 Signed-off-by: hang cheng <hang.cheng@amlogic.com> Signed-off-by: zongdong.jiao <zongdong.jiao@amlogic.com>