enable docker ppp

hc

2023-12-09 95099d4622f8cb224d94e314c7a8e0df60b13f87

 kernel/drivers/media/pci/b2c2/Makefile
..
..
@@ -6,4 +6,4 @@
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 b2c2-flexcop-pci-objs += flexcop-pci.o
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 obj-$(CONFIG_DVB_B2C2_FLEXCOP_PCI) += b2c2-flexcop-pci.o
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-ccflags-y += -Idrivers/media/common/b2c2/
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+ccflags-y += -I $(srctree)/drivers/media/common/b2c2/