enable docker ppp

hc

2023-12-09 95099d4622f8cb224d94e314c7a8e0df60b13f87

 kernel/arch/sh/kernel/cpu/shmobile/Makefile
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..
@@ -1,3 +1,4 @@
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+# SPDX-License-Identifier: GPL-2.0
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 #
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 # Makefile for the Linux/SuperH SH-Mobile backends.
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 #