config: enable CONFIG_QOS_SCHED_PRIO_LB for x86 and arm64

euleros inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I5HF3M
CVE: NA

Reference: https://gitee.com/openeuler/kernel/pulls/41



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set CONFIG_QOS_SCHED_PRIO_LB to y:

This feature enable priority load balance
for QoS scheduler, which prefer migrating online tasks
and migrating offline tasks secondly.

Signed-off-by: zhangsong <zhangsong34@huawei.com>