rename generic_setattr

Despite its name it's now a generic implementation of ->setattr, but
rather a helper to copy attributes from a struct iattr to the inode.
Rename it to setattr_copy to reflect this fact.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/fat/file.c

@@ -446,7 +446,7 @@ int fat_setattr(struct dentry *dentry, struct iattr *attr)
 			goto out;
 	}
 
-	generic_setattr(inode, attr);
+	setattr_copy(inode, attr);
 	mark_inode_dirty(inode);
 out:
 	return error;