configs: enable CONFIG_SMC and CONFIG_SMC_DIAG by default

sangfor inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I77NNI



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SMC is used to accelerate socket applications using RDMA.
Enable it as a module for furture use.

Signed-off-by: Yingyu Zeng <zengyingyu@sangfor.com.cn>