smp: fix barrier usage in smp initialization code
smp: fix barrier usage in smp initialization code

inited variable may be destroyed while still in use by other threads.
Fix it by making its scope static.

dwdm/seastar,tempbottle/seastar,gwicke/scylla,xtao/seastar,avikivity/seastar,glommer/scylla,duarten/scylla,syuu1228/seastar,scylladb/scylla-seastar,bowlofstew/seastar,asias/scylla,respu/scylla,flashbuckets/seastar,acbellini/seastar,phonkee/scylla,stamhe/seastar,kjniemi/seastar,bzero/seastar,dwdm/seastar,avikivity/seastar,shaunstanislaus/scylla,wildinto/scylla,kjniemi/scylla,dwdm/scylla,bowlofstew/scylla,shaunstanislaus/scylla,stamhe/seastar,norcimo5/seastar,raphaelsc/seastar,kjniemi/scylla,linearregression/seastar,slivne/seastar,dwdm/scylla,syuu1228/seastar,rentongzhang/scylla,tempbottle/scylla,linearregression/scylla,norcimo5/seastar,tempbottle/seastar,tempbottle/scylla,kjniemi/seastar,sjperkins/seastar,respu/scylla,hongliangzhao/seastar,gwicke/scylla,mixja/seastar,avikivity/scylla,leejir/seastar,syuu1228/seastar,senseb/scylla,glommer/scylla,aruanruan/scylla,ducthangho/imdb,asias/scylla,raphaelsc/scylla,raphaelsc/seastar,shyamalschandra/seastar,phonkee/scylla,flashbuckets/seastar,kangkot/scylla,raphaelsc/scylla,scylladb/seastar,stamhe/seastar,kangkot/scylla,senseb/scylla,leejir/seastar,sjperkins/seastar,leejir/seastar,ducthangho/imdb,rluta/scylla,kjniemi/seastar,phonkee/scylla,rentongzhang/scylla,dreamsxin/seastar,chunshengster/seastar,stamhe/scylla,justintung/scylla,kjniemi/scylla,printedheart/seastar,xtao/seastar,justintung/scylla,guiquanz/scylla,dwdm/scylla,mixja/seastar,koolhazz/seastar,shyamalschandra/seastar,eklitzke/scylla,rluta/scylla,capturePointer/scylla,joerg84/seastar,cloudius-systems/seastar,bowlofstew/seastar,acbellini/scylla,linearregression/scylla,tempbottle/seastar,acbellini/seastar,hongliangzhao/seastar,avikivity/scylla,stamhe/scylla,eklitzke/scylla,linearregression/seastar,koolhazz/seastar,gwicke/scylla,bowlofstew/scylla,joerg84/seastar,scylladb/scylla,shyamalschandra/seastar,jonathanleang/seastar,rluta/scylla,mixja/seastar,scylladb/seastar,scylladb/scylla-seastar,kangkot/scylla,wildinto/seastar,rentongzhang/scylla,dreamsxin/seastar,raphaelsc/scylla,wildinto/seastar,justintung/scylla,hongliangzhao/seastar,cloudius-systems/seastar,acbellini/scylla,koolhazz/seastar,stamhe/scylla,duarten/scylla,asias/scylla,scylladb/scylla,bzero/seastar,linearregression/seastar,avikivity/seastar,senseb/scylla,bzero/seastar,linearregression/scylla,ducthangho/imdb,avikivity/scylla,victorbriz/scylla,guiquanz/scylla,anzihenry/seastar,wildinto/scylla,respu/scylla,guiquanz/scylla,joerg84/seastar,aruanruan/scylla,scylladb/scylla,norcimo5/seastar,wildinto/seastar,anzihenry/seastar,raphaelsc/seastar,scylladb/scylla-seastar,acbellini/seastar,scylladb/seastar,printedheart/seastar,victorbriz/scylla,flashbuckets/seastar,victorbriz/scylla,slivne/seastar,chunshengster/seastar,jonathanleang/seastar,duarten/scylla,glommer/scylla,jonathanleang/seastar,sjperkins/seastar,slivne/seastar,capturePointer/scylla,scylladb/scylla,anzihenry/seastar,bowlofstew/seastar,xtao/seastar,capturePointer/scylla,acbellini/scylla,bowlofstew/scylla,tempbottle/scylla,printedheart/seastar,shaunstanislaus/scylla,eklitzke/scylla,dreamsxin/seastar,cloudius-systems/seastar,chunshengster/seastar,dwdm/seastar,wildinto/scylla,aruanruan/scylla