ARM: OMAP: switch to gpio_direction_input

More switchover to the cross-platform GPIO interface:
use gpio_direction_input(), not an OMAP-specific call.

Signed-off-by: David Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/drivers/mtd/onenand/omap2.c b/drivers/mtd/onenand/omap2.c
index cf1501d..197d8e5 100644
--- a/drivers/mtd/onenand/omap2.c
+++ b/drivers/mtd/onenand/omap2.c
@@ -634,7 +634,7 @@
 				"OneNAND\n", c->gpio_irq);
 			goto err_iounmap;
 	}
-	omap_set_gpio_direction(c->gpio_irq, 1);
+	gpio_direction_input(c->gpio_irq);
 
 	if ((r = request_irq(OMAP_GPIO_IRQ(c->gpio_irq),
 			     omap2_onenand_interrupt, IRQF_TRIGGER_RISING,