drm/amd/display: Extend DMUB HW params to allow DM to specify boot options

[Why & How]
Add the field to HW params to allow DM dynamically pass down debug and
boot options as needed.

Signed-off-by: Eric Yang <Eric.Yang2@amd.com>
Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Wayne Lin <Wayne.Lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>