[lwip][ppp]: fix the risk of name member contamination in the ppp netif #3824

Job	Run time
RISCV-smp :default.cfg	1m 28s
RISCV :default.cfg	1m 27s
A9-rtsmart :default.cfg	1m 22s
RISCV-rtsmart :default.cfg	1m 18s
A9-smp :default.cfg	1m 41s
A9 :default.cfg	1m 36s
AARCH64-rtsmart :default.cfg	1m 32s
AARCH64 :default.cfg	1m 33s
XUANTIE-rtsmart :default.cfg	1m 54s
A9-smp :kernel/kernel_basic.cfg	7m 17s
A9 :kernel/ipc.cfg	5m 18s
A9 :kernel/mem.cfg	1m 24s
A9 :kernel/kernel_basic.cfg	6m 37s
A9-rtsmart :kernel/ipc.cfg	5m 54s
A9-smp :kernel/ipc.cfg	5m 36s
A9 :components/netdev.cfg	1m 36s
RISCV-smp :kernel/mem.cfg	1m 26s
XUANTIE-rtsmart :kernel/mem.cfg	1m 48s
A9 :components/dfs.cfg	1m 20s
A9-rtsmart :kernel/kernel_basic.cfg	6m 23s
AARCH64-rtsmart :kernel/mem.cfg	1m 19s
A9 :kernel/atomic_c11.cfg	1m 16s
A9-rtsmart :kernel/mem.cfg	1m 25s
A9 :components/lwip.cfg	1m 24s
RISCV :kernel/atomic_c11.cfg	1m 26s
RISCV :kernel/ipc.cfg	5m 28s
RISCV :kernel/kernel_basic.cfg	6m 32s
AARCH64 :kernel/mem.cfg	1m 51s
RISCV-rtsmart :kernel/kernel_basic.cfg	6m 32s
RISCV-rtsmart :kernel/ipc.cfg	5m 24s
XUANTIE-rtsmart :kernel/kernel_basic.cfg	7m 15s
A9 :components/sal.cfg	1m 30s
AARCH64-smp :kernel/mem.cfg	1m 29s
RISCV-rtsmart :kernel/mem.cfg	1m 34s
XUANTIE-rtsmart :kernel/ipc.cfg	6m 28s
A9-smp :kernel/mem.cfg	2m 5s
A9 :cpp11/cpp11.cfg	1m 14s
AARCH64-smp :default.cfg	1m 54s
RISCV :kernel/mem.cfg	1m 7s
	1h 55m 43s

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