drm/amd/display: Add additional IPS entry/exit for PSR/Replay

drm/amd/display: Add additional IPS entry/exit for PSR/Replay

[Why]
Multiple paths issue DMUB commands without managing IPS state, causing
dc_wake_and_execute_gpint/dmub_cmd to internally wake from IPS and
reallow idle. This flips idle_allowed back to true while
idle_optimizations_allowed remains false during in-flight commits,
desynchronizing the two flags.

Affected paths:

- amdgpu_dm_psr_set_event() and amdgpu_dm_replay_set_event() calls from
  amdgpu_dm_handle_vrr_transition(), amdgpu_dm_commit_planes() and
  amdgpu_dm_mod_power_update_streams(), that are invoked on atomic commits.
- debugfs psr_get(), psr_read_residency(), replay_get_state(),
  replay_set_residency() access hardware without holding dc_lock or
  disabling IPS.

[How]
- Explicitly exit IPS before PSR/Replay set_event w/ hw_programming,
  called within atomic commit.
- Wrap debugfs PSR/Replay state getters and setters with IPS exit/entry +
  dc_lock.

Reviewed-by: Sunpeng Li <sunpeng.li@amd.com>
Signed-off-by: Ivan Lipski <ivan.lipski@amd.com>
Signed-off-by: James Lin <pinglei.lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>