usb: musb: dsps: do not set is_active on the first drvbus interrupt

Quite early on init there is an vbus / drvvbus interrupt comming and the
dsps code sets is_active to one. As a result we see a lot of

|musb_bus_suspend 2459: trying to suspend as a_wait_bcon while active

until a device is plugged in with pm_runtime enabled in the kernel.
After checking davinci, am35, da8xx I noticed that dsps is actually the
only one doing this.
So remove it and we won't flooded with mesages and the idle port can be
suspended.
Signed-off-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: NFelipe Balbi <balbi@ti.com>

drivers/usb/musb/musb_dsps.c

@@ -314,7 +314,6 @@ static irqreturn_t dsps_interrupt(int irq, void *hci)
 					jiffies + wrp->poll_seconds * HZ);
 			WARNING("VBUS error workaround (delay coming)\n");
 		} else if (drvvbus) {
-			musb->is_active = 1;
 			MUSB_HST_MODE(musb);
 			musb->xceiv->otg->default_a = 1;
 			musb->xceiv->state = OTG_STATE_A_WAIT_VRISE;