drm/xe: Prefer single underscore for header guards

Keep header guards consistent with regard to ifdef used. Prefer the more
commonly used in the driver.

	$ git grep  "ifndef __XE_" -- drivers/gpu/drm/xe | wc -l
	8
	$ git grep  "ifndef _XE_" -- drivers/gpu/drm/xe | wc -l
	112
Signed-off-by: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Matt Roper <matthew.d.roper@intel.com>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

drivers/gpu/drm/xe/tests/xe_bo_test.h

@@ -3,8 +3,8 @@
  * Copyright © 2023 Intel Corporation
  */
 
-#ifndef __XE_BO_TEST_H__
-#define __XE_BO_TEST_H__
+#ifndef _XE_BO_TEST_H_
+#define _XE_BO_TEST_H_
 
 struct kunit;
 

drivers/gpu/drm/xe/tests/xe_dma_buf_test.h

@@ -3,8 +3,8 @@
  * Copyright © 2023 Intel Corporation
  */
 
-#ifndef __XE_DMA_BUF_TEST_H__
-#define __XE_DMA_BUF_TEST_H__
+#ifndef _XE_DMA_BUF_TEST_H_
+#define _XE_DMA_BUF_TEST_H_
 
 struct kunit;
 

drivers/gpu/drm/xe/tests/xe_migrate_test.h

@@ -3,8 +3,8 @@
  * Copyright © 2023 Intel Corporation
  */
 
-#ifndef __XE_MIGRATE_TEST_H__
-#define __XE_MIGRATE_TEST_H__
+#ifndef _XE_MIGRATE_TEST_H_
+#define _XE_MIGRATE_TEST_H_
 
 struct kunit;
 

drivers/gpu/drm/xe/tests/xe_test.h

@@ -3,8 +3,8 @@
  * Copyright © 2022 Intel Corporation
  */
 
-#ifndef __XE_TEST_H__
-#define __XE_TEST_H__
+#ifndef _XE_TEST_H_
+#define _XE_TEST_H_
 
 #include <linux/types.h>
 

drivers/gpu/drm/xe/xe_gt_topology.h

@@ -3,8 +3,8 @@
  * Copyright © 2022 Intel Corporation
  */
 
-#ifndef __XE_GT_TOPOLOGY_H__
-#define __XE_GT_TOPOLOGY_H__
+#ifndef _XE_GT_TOPOLOGY_H_
+#define _XE_GT_TOPOLOGY_H_
 
 #include "xe_gt_types.h"
 
@@ -17,4 +17,4 @@ void xe_gt_topology_dump(struct xe_gt *gt, struct drm_printer *p);
 unsigned int
 xe_dss_mask_group_ffs(xe_dss_mask_t mask, int groupsize, int groupnum);
 
-#endif /* __XE_GT_TOPOLOGY_H__ */
+#endif /* _XE_GT_TOPOLOGY_H_ */

drivers/gpu/drm/xe/xe_map.h

@@ -3,8 +3,8 @@
  * Copyright © 2022 Intel Corporation
  */
 
-#ifndef __XE_MAP_H__
-#define __XE_MAP_H__
+#ifndef _XE_MAP_H_
+#define _XE_MAP_H_
 
 #include <linux/iosys-map.h>
 

drivers/gpu/drm/xe/xe_migrate.h

@@ -3,8 +3,8 @@
  * Copyright © 2020 Intel Corporation
  */
 
-#ifndef __XE_MIGRATE__
-#define __XE_MIGRATE__
+#ifndef _XE_MIGRATE_
+#define _XE_MIGRATE_
 
 #include <drm/drm_mm.h>
 

drivers/gpu/drm/xe/xe_res_cursor.h

@@ -21,8 +21,8 @@
  * OTHER DEALINGS IN THE SOFTWARE.
  */
 
-#ifndef __XE_RES_CURSOR_H__
-#define __XE_RES_CURSOR_H__
+#ifndef _XE_RES_CURSOR_H_
+#define _XE_RES_CURSOR_H_
 
 #include <linux/scatterlist.h>