usb: musb: core: declare mbase only where it's used

... and avoid a compilation if we disable host side
of musb.
Signed-off-by: Felipe Balbi <felipe.balbi@nokia.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/musb/musb_core.c

@@ -379,7 +379,6 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 				u8 devctl, u8 power)
 {
 	irqreturn_t handled = IRQ_NONE;
-	void __iomem *mbase = musb->mregs;
 
 	DBG(3, "<== Power=%02x, DevCtl=%02x, int_usb=0x%x\n", power, devctl,
 		int_usb);
@@ -394,6 +393,8 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 
 		if (devctl & MUSB_DEVCTL_HM) {
 #ifdef CONFIG_USB_MUSB_HDRC_HCD
+			void __iomem *mbase = musb->mregs;
+
 			switch (musb->xceiv->state) {
 			case OTG_STATE_A_SUSPEND:
 				/* remote wakeup?  later, GetPortStatus
@@ -471,6 +472,8 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 #ifdef CONFIG_USB_MUSB_HDRC_HCD
 	/* see manual for the order of the tests */
 	if (int_usb & MUSB_INTR_SESSREQ) {
+		void __iomem *mbase = musb->mregs;
+
 		DBG(1, "SESSION_REQUEST (%s)\n", otg_state_string(musb));
 
 		/* IRQ arrives from ID pin sense or (later, if VBUS power
@@ -519,6 +522,8 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 		case OTG_STATE_A_WAIT_BCON:
 		case OTG_STATE_A_WAIT_VRISE:
 			if (musb->vbuserr_retry) {
+				void __iomem *mbase = musb->mregs;
+
 				musb->vbuserr_retry--;
 				ignore = 1;
 				devctl |= MUSB_DEVCTL_SESSION;
@@ -622,6 +627,7 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 
 	if (int_usb & MUSB_INTR_CONNECT) {
 		struct usb_hcd *hcd = musb_to_hcd(musb);
+		void __iomem *mbase = musb->mregs;
 
 		handled = IRQ_HANDLED;
 		musb->is_active = 1;