add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/arch/mips/pci/fixup-sni.c
..
..
@@ -151,8 +151,7 @@
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 	case SNI_BRD_PCI_MTOWER:
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 		if (is_rm300_revd())
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 			return irq_tab_rm300d[slot][pin];
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-		/* fall through */
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-
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+		fallthrough;
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 	case SNI_BRD_PCI_DESKTOP:
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 		return irq_tab_rm200[slot][pin];
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