powerpc/spufs: set nlink count for spufs root correctly

Currently, an empty spufs root inode has nlink count of 1. However,
the directory has two links; / -> spu and /spu/ -> .

This change increments the link count of the root inode in spufs.
Signed-off-by: NJeremy Kerr <jk@ozlabs.org>

arch/powerpc/platforms/cell/spufs/inode.c

@@ -755,6 +755,7 @@ spufs_create_root(struct super_block *sb, void *data)
 	inode->i_op = &simple_dir_inode_operations;
 	inode->i_fop = &simple_dir_operations;
 	SPUFS_I(inode)->i_ctx = NULL;
+	inc_nlink(inode);
 
 	ret = -EINVAL;
 	if (!spufs_parse_options(sb, data, inode))