CVE-2026-98108 Bluetooth: L2CAP: fix chan mode for LE_CONN_REQ + EXT_FLOWCTL pchan

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: fix chan mode for LECONNREQ + EXTFLOWCTL pchan l2capnewconnection sets default value of channel mode to match the parent channel. l2capleconnectreq left this at the default, and created L2CAPMODEEXTFLOWCTL...