msm: mdss: Fix error cases in AD config

The BL linearity LUT was not being copied correctly. This change allows
AD config to exit with errors correctly if the BL linearity LUT is not
passed correctly.

Change-Id: I491a7cc4b168b7691c65cbc2d2963f8a7a3f804d
Signed-off-by: Benet Clark <benetc@codeaurora.org>