add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/drivers/usb/host/ehci-dbg.c
..
..
@@ -823,7 +823,7 @@
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 				break;
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 			case 0:		/* illegal reserved capability */
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 				cap = 0;
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-				/* FALLTHROUGH */
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+				fallthrough;
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 			default:		/* unknown */
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 				break;
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 			}