add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/staging/most/sound/Makefile
..
..
@@ -1,4 +1,4 @@
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+# SPDX-License-Identifier: GPL-2.0
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 obj-$(CONFIG_MOST_SOUND) += most_sound.o
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 most_sound-objs := sound.o
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-ccflags-y += -Idrivers/staging/