staging: qlge: Fix fall-through warnings for Clang

In preparation to enable -Wimplicit-fallthrough for Clang, fix a warning
by explicitly adding a break statement instead of letting the code fall
through to the next case.

Link: https://github.com/KSPP/linux/issues/115Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Link: https://lore.kernel.org/r/673bd9f27bcc2df8c9d12be94f54001d8066d4ab.1605896060.git.gustavoars@kernel.orgSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/qlge/qlge_main.c

@@ -1382,6 +1382,7 @@ static void ql_categorize_rx_err(struct ql_adapter *qdev, u8 rx_err,
 		break;
 	case IB_MAC_IOCB_RSP_ERR_CRC:
 		stats->rx_crc_err++;
+		break;
 	default:
 		break;
 	}