use check_block_and_slaves in for_each_host_dev_and_slaves

for_each_host_dev_and_slaves currently is used in some module check()
functions and it's not necessary iterate all slaves. So use
check_block_and_slaves instead of check_block_and_slaves_all is fine.

Signed-off-by: Dave Young <dyoung@redhat.com>

dracut-functions.sh

@@ -468,7 +468,7 @@ for_each_host_dev_and_slaves()
     local _dev
     for _dev in ${host_devs[@]}; do
         [[ -b "$_dev" ]] || continue
-        check_block_and_slaves_all $_func $(get_maj_min $_dev) && return 0
+        check_block_and_slaves $_func $(get_maj_min $_dev) && return 0
     done
     return 1
 }