coresight: etm4x: Fix accesses to TRCSEQRSTEVR and TRCSEQSTR

driver inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I5YCYK



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The TRCSEQRSTEVR and TRCSEQSTR register is not implemented if the
TRCIDR5.NUMSEQSTATE == 0. Skip accessing the register in such cases.

Signed-off-by: Junhao He <hejunhao3@huawei.com>
Reviewed-by: Ling Mingqiang <lingmingqiang@huawei.com>
Reviewed-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Reviewed-by: Yang Shen <shenyang39@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>