CVE-2025-38265 serial: jsm: fix NPE during jsm_uart_port_init

In the Linux kernel, the following vulnerability has been resolved: serial: jsm: fix NPE during jsmuartportinit No device was set which caused serialbasectrladd to crash. BUG: kernel NULL pointer dereference, address: 0000000000000050 Oops: Oops: 0000 1 PREEMPT SMP NOPTI CPU: 16 UID: 0 PID: 368...