MTD: OMAP2-NAND: Fix partition reading from board info

This patch fixes the omap2 nand driver code that allows
reading of partition data from board info.

The parse_mtd_partitions() function no longer returns a
negative error in case cmdline is not passed.
See commit: b0d06afbSigned-off-by: Nishant Kamat <nskamat@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

drivers/mtd/nand/omap2.c

@@ -636,7 +636,7 @@ static int __devinit omap_nand_probe(struct platform_device *pdev)
 	err = parse_mtd_partitions(&info->mtd, part_probes, &info->parts, 0);
 	if (err > 0)
 		add_mtd_partitions(&info->mtd, info->parts, err);
-	else if (err < 0 && pdata->parts)
+	else if (pdata->parts)
 		add_mtd_partitions(&info->mtd, pdata->parts, pdata->nr_parts);
 	else
 #endif