arm64: phytium: using MIDR_PHYTIUM_FT2000PLUS instead of ARM_CPU_IMP_PHYTIUM

hulk inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I41AUQ


CVE: NA

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Update the code to using MIDR_PHYTIUM_FT2000PLUS, instead of
ARM_CPU_IMP_PHYTIUM, which will distinguish FTC662 and FTC663.

Signed-off-by: Hanjun Guo <guohanjun@huawei.com>
Cc: Guo Hui <guohui@uniontech.com>
Cc: Cheng Jian <cj.chengjian@huawei.com>
Cc: Zhen Lei <thunder.leizhen@huawei.com>
Cc: Xiuqi Xie <xiexiuqi@huawei.com>
Reviewed-by: Xie XiuQi <xiexiuqi@huawei.com>
Signed-off-by: Cheng Jian <cj.chengjian@huawei.com>