kernel: update SP3 OPENEULER_MINOR value to 3

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/src-openeuler/kernel/issues/I8K3T6



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The version information OPENEULER_MINOR is not right in SP3,
update it's value to 3.

Signed-off-by: Jialin Zhang <zhangjialin11@huawei.com>