usb: chipidea: core: wrap ci_handle_power_lost() with CONFIG_PM_SLEEP

If CONFIG_PM_SLEEP is not set, the following error will be shown up
when build kernel:
    error: 'ci_handle_power_lost' defined but not used.

This will move ci_handle_power_lost() to an area wrapped by
CONFIG_PM_SLEEP.
Signed-off-by: Xu Yang <xu.yang_2@nxp.com>
Fixes: 74494b33 ("usb: chipidea: core: add controller resume support when controller is powered off")
Reported-by: Conor Dooley <conor.dooley@microchip.com>
Tested-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20221026121157.1491302-1-xu.yang_2@nxp.comSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/chipidea/core.c

@@ -661,25 +661,6 @@ static enum ci_role ci_get_role(struct ci_hdrc *ci)
 	return role;
 }
 
-static void ci_handle_power_lost(struct ci_hdrc *ci)
-{
-	enum ci_role role;
-
-	disable_irq_nosync(ci->irq);
-	if (!ci_otg_is_fsm_mode(ci)) {
-		role = ci_get_role(ci);
-
-		if (ci->role != role) {
-			ci_handle_id_switch(ci);
-		} else if (role == CI_ROLE_GADGET) {
-			if (ci->is_otg && hw_read_otgsc(ci, OTGSC_BSV))
-				usb_gadget_vbus_connect(&ci->gadget);
-		}
-	}
-
-	enable_irq(ci->irq);
-}
-
 static struct usb_role_switch_desc ci_role_switch = {
 	.set = ci_usb_role_switch_set,
 	.get = ci_usb_role_switch_get,
@@ -1400,6 +1381,25 @@ static int ci_suspend(struct device *dev)
 	return 0;
 }
 
+static void ci_handle_power_lost(struct ci_hdrc *ci)
+{
+	enum ci_role role;
+
+	disable_irq_nosync(ci->irq);
+	if (!ci_otg_is_fsm_mode(ci)) {
+		role = ci_get_role(ci);
+
+		if (ci->role != role) {
+			ci_handle_id_switch(ci);
+		} else if (role == CI_ROLE_GADGET) {
+			if (ci->is_otg && hw_read_otgsc(ci, OTGSC_BSV))
+				usb_gadget_vbus_connect(&ci->gadget);
+		}
+	}
+
+	enable_irq(ci->irq);
+}
+
 static int ci_resume(struct device *dev)
 {
 	struct ci_hdrc *ci = dev_get_drvdata(dev);