disable kernel build waring

hc

2024-05-10 093a6c67005148ae32a5c9e4553491b9f5c2457b

 kernel/drivers/video/fbdev/omap2/Kconfig
..
..
@@ -1,3 +1,4 @@
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+# SPDX-License-Identifier: GPL-2.0-only
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 if OF && (ARCH_OMAP2PLUS || COMPILE_TEST)
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 source "drivers/video/fbdev/omap2/omapfb/Kconfig"