drm/xe: Remove redundant functions to get xe

xe_device.h implements these helpers, just use them.
Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240321213818.72311-1-lucas.demarchi@intel.comSigned-off-by: Lucas De Marchi <lucas.demarchi@intel.com>

drivers/gpu/drm/xe/xe_hw_engine_class_sysfs.c

@@ -7,6 +7,7 @@
 #include <linux/kobject.h>
 #include <linux/sysfs.h>
 
+#include "xe_device.h"
 #include "xe_gt.h"
 #include "xe_hw_engine_class_sysfs.h"
 #include "xe_pm.h"
@@ -569,18 +570,6 @@ static void xe_hw_engine_sysfs_kobj_release(struct kobject *kobj)
 	kfree(kobj);
 }
 
-#include "xe_pm.h"
-
-static inline struct xe_device *pdev_to_xe_device(struct pci_dev *pdev)
-{
-	return pci_get_drvdata(pdev);
-}
-
-static inline struct xe_device *to_xe_device(const struct drm_device *dev)
-{
-	return container_of(dev, struct xe_device, drm);
-}
-
 static ssize_t xe_hw_engine_class_sysfs_attr_show(struct kobject *kobj,
 						  struct attribute *attr,
 						  char *buf)