[kmac/dv] Fix CSR test failure
[kmac/dv] Fix CSR test failure

Encountered some failure when running CI. After debug this, I found this timer
shouldn't be written in CSR test, otherwise, it may cause SVA errors.

Signed-off-by: Weicai Yang <4fa8c7762ee4da95e3dee7dae2c3263ea16637f9@google.com>

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