drm/radeon: Convert legacy DRM logging in evergreen.c to drm_* helpers

drm/radeon: Convert legacy DRM logging in evergreen.c to drm_* helpers

Replace DRM_DEBUG(), DRM_ERROR(), and DRM_INFO() calls with the
corresponding drm_dbg(), drm_err(), and drm_info() helpers in the
radeon driver.

The drm_*() logging helpers take a struct drm_device * argument,
allowing the DRM core to prefix log messages with the correct device
name and instance. This is required to correctly distinguish log
messages on systems with multiple GPUs.

This change aligns radeon with the DRM TODO item:
"Convert logging to drm_* functions with drm_device parameter".

Signed-off-by: Abhishek Rajput <abhiraj21put@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>