drm/amd/display: Unify DC logging for BW Alloc

[WHY]
To keep all logging within DC unified

[HOW]
Use the standard DC Logging functions

Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Reviewed-by: Meenakshikumar Somasundaram <Meenakshikumar.Somasundaram@amd.com>
Acked-by: Qingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: Mustapha Ghaddar <mghaddar@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>