OMAP: PM: disable idle on suspend for GPIO and UART

Until these drivers are runtime PM converted, their device power
states are managed by calling custom driver hooks late in the
idle/suspend path.  Therefore, do not let the suspend/resume core code
automatically idle these devices since they will be managed manually
by the OMAP PM core very late in the idle/suspend path.

Signed-off-by: Kevin Hilman <khilman@ti.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
diff --git a/arch/arm/mach-omap2/serial.c b/arch/arm/mach-omap2/serial.c
index 1ac361b..466fc722 100644
--- a/arch/arm/mach-omap2/serial.c
+++ b/arch/arm/mach-omap2/serial.c
@@ -805,6 +805,7 @@
 	WARN(IS_ERR(od), "Could not build omap_device for %s: %s.\n",
 	     name, oh->name);
 
+	omap_device_disable_idle_on_suspend(od);
 	oh->mux = omap_hwmod_mux_init(bdata->pads, bdata->pads_cnt);
 
 	uart->irq = oh->mpu_irqs[0].irq;