drm/xe/gt_print: add xe_gt_err_once()

Needed in an upcoming patch, where we want GT level print, but only
which to trigger once to avoid flooding dmesg.
Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Balasubramani Vivekanandan <balasubramani.vivekanandan@intel.com>
Reviewed-by: Nirmoy Das <nirmoy.das@intel.com>
Signed-off-by: Radhakrishna Sripada <radhakrishna.sripada@intel.com>
Acked-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240430172850.1881525-17-radhakrishna.sripada@intel.com

drivers/gpu/drm/xe/xe_gt_printk.h

@@ -13,6 +13,9 @@
 #define xe_gt_printk(_gt, _level, _fmt, ...) \
 	drm_##_level(&gt_to_xe(_gt)->drm, "GT%u: " _fmt, (_gt)->info.id, ##__VA_ARGS__)
 
+#define xe_gt_err_once(_gt, _fmt, ...) \
+	xe_gt_printk((_gt), err_once, _fmt, ##__VA_ARGS__)
+
 #define xe_gt_err(_gt, _fmt, ...) \
 	xe_gt_printk((_gt), err, _fmt, ##__VA_ARGS__)