usb: musb: core: add missing curly braces

no functional changes, clean up only.
Tested-by: Bin Liu <b-liu@ti.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

drivers/usb/musb/musb_core.c

@@ -887,9 +887,9 @@ static irqreturn_t musb_stage0_irq(struct musb *musb, u8 int_usb,
 			 * caused BABBLE. When HS BABBLE happens we can only
 			 * stop the session.
 			 */
-			if (devctl & (MUSB_DEVCTL_FSDEV | MUSB_DEVCTL_LSDEV))
+			if (devctl & (MUSB_DEVCTL_FSDEV | MUSB_DEVCTL_LSDEV)) {
 				dev_dbg(musb->controller, "BABBLE devctl: %02x\n", devctl);
-			else {
+			} else {
 				ERR("Stopping host session -- babble\n");
 				musb_writeb(musb->mregs, MUSB_DEVCTL, 0);
 			}