drm/xe: Introduce GT-oriented SR-IOV logging macros

To simplify logging and help identify SR-IOV specific messages
related to the GT, define set of helper macros that will add
prefix to the messages based on the current SR-IOV mode.

Reviewed-by: Piotr Piórkowski <piotr.piorkowski@intel.com>
Link: https://lore.kernel.org/r/20240104222031.277-4-michal.wajdeczko@intel.com
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>