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/arch/arm/mach-omap1/serial.c b/arch/arm/mach-omap1/serial.c
index 528691d5c..1a0bc47 100644
--- a/arch/arm/mach-omap1/serial.c
+++ b/arch/arm/mach-omap1/serial.c
@@ -250,7 +250,7 @@
 		       gpio_nr);
 		return;
 	}
-	omap_set_gpio_direction(gpio_nr, 1);
+	gpio_direction_input(gpio_nr);
 	ret = request_irq(OMAP_GPIO_IRQ(gpio_nr), &omap_serial_wake_interrupt,
 			  IRQF_TRIGGER_RISING, "serial wakeup", NULL);
 	if (ret) {