It's just a lot clearer to use | operator instead of
+ operator.
Caught by coccicheck:
	"
	drivers/usb/dwc2/gadget.c:2883:26-27: WARNING: sum of probable
	bitmasks, consider |
	"
Cc: John Youn <John.Youn@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
                epctl = readl(hs->regs + epreg);
 
                if (value) {
-                       epctl |= DXEPCTL_STALL + DXEPCTL_SNAK;
+                       epctl |= DXEPCTL_STALL | DXEPCTL_SNAK;
                        if (epctl & DXEPCTL_EPENA)
                                epctl |= DXEPCTL_EPDIS;
                } else {