add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/mips/pci/ops-bcm63xx.c
..
..
@@ -474,6 +474,7 @@
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 		if (PCI_SLOT(devfn) == 0)
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 			return bcm_pcie_readl(PCIE_DLSTATUS_REG)
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 					& DLSTATUS_PHYLINKUP;
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+		fallthrough;
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 	default:
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 		return false;
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 	}