drm/amd/display: Move populate dml pipes from DCN314 to dml

The function responsible for populating DML pipes has some FPU
operations, and for this reason, it must be moved to the dml folder.
This commit moves such function from resource to the fpu file under the
dml folder.

Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>