regmap: get rid of redundant debugfs_file_{get,put}()

pointless in ->read()/->write() of file_operations used only via
debugfs_create_file()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Link: https://patch.msgid.link/20250702211602.GC3406663@ZenIV
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: Al Viro

drivers/base/regmap/regmap-debugfs.c

@@ -470,10 +470,6 @@ static ssize_t regmap_cache_only_write_file(struct file *file,
 	if (err)
 		return count;
 
-	err = debugfs_file_get(file->f_path.dentry);
-	if (err)
-		return err;
-
 	map->lock(map->lock_arg);
 
 	if (new_val && !map->cache_only) {
@@ -486,7 +482,6 @@ static ssize_t regmap_cache_only_write_file(struct file *file,
 	map->cache_only = new_val;
 
 	map->unlock(map->lock_arg);
-	debugfs_file_put(file->f_path.dentry);
 
 	if (require_sync) {
 		err = regcache_sync(map);
@@ -517,10 +512,6 @@ static ssize_t regmap_cache_bypass_write_file(struct file *file,
 	if (err)
 		return count;
 
-	err = debugfs_file_get(file->f_path.dentry);
-	if (err)
-		return err;
-
 	map->lock(map->lock_arg);
 
 	if (new_val && !map->cache_bypass) {
@@ -532,7 +523,6 @@ static ssize_t regmap_cache_bypass_write_file(struct file *file,
 	map->cache_bypass = new_val;
 
 	map->unlock(map->lock_arg);
-	debugfs_file_put(file->f_path.dentry);
 
 	return count;
 }