drm/xe/guc: Print GuC error codes as hex value

We maintain GuC error code values in hex format. Also print them
in that format for easier matching.

While at it, slightly reformat the log and add missing \n.

Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Matthew Brost <matthew.brost@intel.com>
Reviewed-by: Matthew Brost <matthew.brost@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240625141258.1257-4-michal.wajdeczko@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>