usb: dwc2: Fix build in periphal-only mode

The bus_suspended member of struct dwc2_hsotg is only present in builds
that support host-mode.

See: #4368

Fixes: 62bb46f ("usb: dwc2: Fix hibernation between host and device modes.")
Signed-off-by: Phil Elwell <[email protected]>

Author: pelwell

drivers/usb/dwc2/core_intr.c

@@ -707,7 +707,11 @@ static inline void dwc_handle_gpwrdn_disc_det(struct dwc2_hsotg *hsotg,
 	dwc2_writel(hsotg, gpwrdn_tmp, GPWRDN);
 
 	hsotg->hibernated = 0;
+
+#if IS_ENABLED(CONFIG_USB_DWC2_HOST) ||	\
+	IS_ENABLED(CONFIG_USB_DWC2_DUAL_ROLE)
 	hsotg->bus_suspended = 0;
+#endif
 
 	if (gpwrdn & GPWRDN_IDSTS) {
 		hsotg->op_state = OTG_STATE_B_PERIPHERAL;