[fix] components: serial_v2: preserve RT_DEVICE_FLAG_STREAM when reop… #3706

Job	Run time
A9 :default.cfg	1m 36s
RISCV :default.cfg	1m 19s
AARCH64 :default.cfg	1m 20s
A9-rtsmart :default.cfg	1m 21s
RISCV-smp :default.cfg	1m 28s
RISCV-rtsmart :default.cfg	1m 24s
AARCH64-rtsmart :default.cfg	1m 14s
XUANTIE-rtsmart :default.cfg	2m 8s
A9-smp :default.cfg	2m 1s
A9-rtsmart :kernel/kernel_basic.cfg	6m 41s
A9 :kernel/mem.cfg	1m 26s
A9-rtsmart :kernel/ipc.cfg	5m 32s
A9 :kernel/kernel_basic.cfg	6m 40s
A9-smp :kernel/ipc.cfg	5m 29s
RISCV :kernel/ipc.cfg	5m 15s
RISCV :kernel/kernel_basic.cfg	7m 3s
A9-smp :kernel/mem.cfg	1m 47s
XUANTIE-rtsmart :kernel/mem.cfg	2m 39s
RISCV-rtsmart :kernel/mem.cfg	1m 13s
XUANTIE-rtsmart :kernel/ipc.cfg	6m 20s
AARCH64-smp :kernel/mem.cfg	1m 36s
AARCH64 :kernel/mem.cfg	1m 25s
A9-rtsmart :kernel/mem.cfg	1m 30s
RISCV-rtsmart :kernel/ipc.cfg	5m 47s
RISCV-rtsmart :kernel/kernel_basic.cfg	6m 40s
RISCV-smp :kernel/mem.cfg	2m 31s
AARCH64-smp :default.cfg	1m 35s
XUANTIE-rtsmart :kernel/kernel_basic.cfg	7m 31s
A9 :components/sal.cfg	1m 45s
A9 :kernel/ipc.cfg	5m 17s
A9 :kernel/atomic_c11.cfg	1m 24s
RISCV :kernel/mem.cfg	1m 15s
A9-smp :kernel/kernel_basic.cfg	6m 59s
A9 :cpp11/cpp11.cfg	1m 31s
A9 :components/dfs.cfg	1m 19s
AARCH64-rtsmart :kernel/mem.cfg	1m 15s
A9 :components/netdev.cfg	1m 58s
A9 :components/lwip.cfg	1m 22s
RISCV :kernel/atomic_c11.cfg	1m 20s
	1h 57m 56s

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