LoongArch: defconfig: update network configurations

LoongArch inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I6N3MM



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Update network configurations accroding to other architectures,so
net related tools (bridge,tc,...) can work normally.

Signed-off-by: Hongchen Zhang <zhanghongchen@loongson.cn>
(cherry picked from commit 61cf3b83)