disable kernel build waring

hc

2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b

 kernel/drivers/gpu/drm/bridge/synopsys/Kconfig
..
..
@@ -1,3 +1,4 @@
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+# SPDX-License-Identifier: GPL-2.0-only
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 config DRM_DW_HDMI
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 	tristate
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 	select DRM_KMS_HELPER