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[rv_dm,rtl] Fix acknowledgment of reset in dmstatus.allhavereset/dmstatus.anyhavereset #15123

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pulp-platform/riscv-dbg#118:

Currently the debug module seems to assume any assertion of ndmreset_o will instantly cause a reset. The dmstatus.allhavereset/dmstatus.anyhavereset bits are set purely on ndmreset_o being asserted rather than any acknowledgement a reset has occurred.

This is incorrect behavior and should be fixed, but it is currently not urgent for us, because the rstmgr resets the system reset domain unconditionally whenever ndmreset_req is asserted (a few cycles after asserting this signal).

estimate 12

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