pda_power: Fix build error if !CONFIG_USB_OTG_UTILS

commit 9ad6398
"pda_power: Add support for using otg transceiver events"
introduces below build error if !CONFIG_USB_OTG_UTILS.

  CC      drivers/power/pda_power.o
drivers/power/pda_power.c: In function 'pda_power_probe':
drivers/power/pda_power.c:322: error: 'otg_is_usb_online' undeclared (first use in this function)
drivers/power/pda_power.c:322: error: (Each undeclared identifier is reported only once
drivers/power/pda_power.c:322: error: for each function it appears in.)
drivers/power/pda_power.c:325: error: 'otg_is_ac_online' undeclared (first use in this function)
drivers/power/pda_power.c:371: error: 'otg_handle_notification' undeclared (first use in this function)
make[2]: *** [drivers/power/pda_power.o] Error 1
make[1]: *** [drivers/power] Error 2
make: *** [drivers] Error 2

This patch adds #ifdef CONFIG_USB_OTG_UTILS guards at necessary places to fix
build errors.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>

drivers/power/pda_power.c

@@ -39,8 +39,11 @@ static struct timer_list supply_timer;
 static struct timer_list polling_timer;
 static int polling;
 
+#ifdef CONFIG_USB_OTG_UTILS
 static struct otg_transceiver *transceiver;
 static struct notifier_block otg_nb;
+#endif
+
 static struct regulator *ac_draw;
 
 enum {
@@ -317,13 +320,15 @@ static int pda_power_probe(struct platform_device *pdev)
 		ret = PTR_ERR(ac_draw);
 	}
 
+#ifdef CONFIG_USB_OTG_UTILS
 	transceiver = otg_get_transceiver();
 	if (transceiver && !pdata->is_usb_online) {
 		pdata->is_usb_online = otg_is_usb_online;
 	}
 	if (transceiver && !pdata->is_ac_online) {
 		pdata->is_ac_online = otg_is_ac_online;
 	}
+#endif
 
 	if (pdata->is_ac_online) {
 		ret = power_supply_register(&pdev->dev, &pda_psy_ac);
@@ -367,6 +372,7 @@ static int pda_power_probe(struct platform_device *pdev)
 		}
 	}
 
+#ifdef CONFIG_USB_OTG_UTILS
 	if (transceiver && pdata->use_otg_notifier) {
 		otg_nb.notifier_call = otg_handle_notification;
 		ret = otg_register_notifier(transceiver, &otg_nb);
@@ -376,6 +382,7 @@ static int pda_power_probe(struct platform_device *pdev)
 		}
 		polling = 0;
 	}
+#endif
 
 	if (polling) {
 		dev_dbg(dev, "will poll for status\n");
@@ -389,17 +396,21 @@ static int pda_power_probe(struct platform_device *pdev)
 
 	return 0;
 
+#ifdef CONFIG_USB_OTG_UTILS
 otg_reg_notifier_failed:
 	if (pdata->is_usb_online && usb_irq)
 		free_irq(usb_irq->start, &pda_psy_usb);
+#endif
 usb_irq_failed:
 	if (pdata->is_usb_online)
 		power_supply_unregister(&pda_psy_usb);
 usb_supply_failed:
 	if (pdata->is_ac_online && ac_irq)
 		free_irq(ac_irq->start, &pda_psy_ac);
+#ifdef CONFIG_USB_OTG_UTILS
 	if (transceiver)
 		otg_put_transceiver(transceiver);
+#endif
 ac_irq_failed:
 	if (pdata->is_ac_online)
 		power_supply_unregister(&pda_psy_ac);