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[WHY & HOW] Setup initial changes required to program another set of watermarks for a 2nd stutter mode. The 2nd stutter mode will be lower power but have higher enter/exit latencies. PMFW to choose which stutter mode to use based on stutter efficiences to see if original stutter (LP1) or low power stutter (LP2) will result in better power savings. Reviewed-by: Alvin Lee <alvin.lee2@amd.com> Signed-off-by: Austin Zheng <Austin.Zheng@amd.com> Signed-off-by: Alex Hung <alex.hung@amd.com> Tested-by: Dan Wheeler <daniel.wheeler@amd.com> Signed-off-by: Alex Deucher <alexander.deucher@amd.com>