drm/xe: use drm based debugging instead of dev

Prefer drm_dbg() over dev_dbg().

Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240212145757.645094-1-jani.nikula@intel.com


Signed-off-by: Jani Nikula <jani.nikula@intel.com>