drm/xe/throttle: Skip reason prefix while emitting array

The newly introduced "reasons" attribute already signifies possible
reasons for throttling and makes the prefix in individual attribute
names redundant while emitting them as an array. Skip the prefix.

Fixes: 83ccde6 ("drm/xe/gt_throttle: Avoid TOCTOU when monitoring reasons")
Signed-off-by: Raag Jadav <raag.jadav@intel.com>
Reviewed-by: Sk Anirban <sk.anirban@intel.com>
Link: https://patch.msgid.link/20251203123355.571606-1-raag.jadav@intel.com
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
(cherry picked from commit b64a143)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>

Author: raagjadav

drivers/gpu/drm/xe/xe_gt_throttle.c

@@ -140,7 +140,7 @@ static ssize_t reasons_show(struct kobject *kobj,
 		struct throttle_attribute *other_ta = kobj_attribute_to_throttle(kattr);
 
 		if (other_ta->mask != U32_MAX && reasons & other_ta->mask)
-			ret += sysfs_emit_at(buff, ret, "%s ", (*pother)->name);
+			ret += sysfs_emit_at(buff, ret, "%s ", (*pother)->name + strlen("reason_"));
 	}
 
 	if (drm_WARN_ONCE(&xe->drm, !ret, "Unknown reason: %#x\n", reasons))