enable docker ppp

hc

2023-12-09 95099d4622f8cb224d94e314c7a8e0df60b13f87

 kernel/drivers/usb/host/ehci-xilinx-of.c
..
..
@@ -66,7 +66,7 @@
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 	 * generic hardware linkage
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 	 */
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 	.irq			= ehci_irq,
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-	.flags			= HCD_MEMORY | HCD_USB2 | HCD_BH,
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+	.flags			= HCD_MEMORY | HCD_DMA | HCD_USB2 | HCD_BH,
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 	/*
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 	 * basic lifecycle operations