drm/amdgpu: move all Kconfig options to amdgpu/Kconfig

For consistency.

Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/Kconfig

@@ -171,9 +171,6 @@ config DRM_AMDGPU
 	  If M is selected, the module will be called amdgpu.
 
 source "drivers/gpu/drm/amd/amdgpu/Kconfig"
-source "drivers/gpu/drm/amd/powerplay/Kconfig"
-
-source "drivers/gpu/drm/amd/acp/Kconfig"
 
 source "drivers/gpu/drm/nouveau/Kconfig"