drivers/perf: Simplify EVENT ATTR macro in xgene_pmu.c

Use common macro PMU_EVENT_ATTR_ID to simplify XGENE_PMU_EVENT_ATTR

Cc: Khuong Dinh <[e-mail]>
Cc: Will Deacon <[e-mail]>
Cc: Mark Rutland <[e-mail]>
Signed-off-by: Qi Liu <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Will Deacon <[e-mail]>

drivers/perf/xgene_pmu.c

···
 static ssize_t xgene_pmu_event_show(struct device *dev,
 				    struct device_attribute *attr, char *buf)
 {
-	struct dev_ext_attribute *eattr;
+	struct perf_pmu_events_attr *pmu_attr =
+		container_of(attr, struct perf_pmu_events_attr, attr);
 
-	eattr = container_of(attr, struct dev_ext_attribute, attr);
-	return sysfs_emit(buf, "config=0x%lx\n", (unsigned long) eattr->var);
+	return sysfs_emit(buf, "config=0x%llx\n", pmu_attr->id);
 }
 
 #define XGENE_PMU_EVENT_ATTR(_name, _config)		\
-	(&((struct dev_ext_attribute[]) {		\
-		{ .attr = __ATTR(_name, S_IRUGO, xgene_pmu_event_show, NULL), \
-		  .var = (void *) _config, }		\
-	 })[0].attr.attr)
+	PMU_EVENT_ATTR_ID(_name, xgene_pmu_event_show, _config)
 
 static struct attribute *l3c_pmu_events_attrs[] = {
 	XGENE_PMU_EVENT_ATTR(cycle-count,			0x00),