drm/amdgpu/swsmu: default to fullscreen 3D profile for dGPUs

This uses more aggressive hueristics than the the bootup default
profile.  On windows the OS has a special fullscreen 3D mode
where this is used.  Since we don't have the equivalent on Linux
default to this profile for dGPUs.

Closes: drm/amd#3618
Closes: drm/amd#1500
Link: drm/amd#3131


Reviewed-by: Kenneth Feng <kenneth.feng@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 336568de)