MLK-21052-06 usb: dwc3: Fix build failure by restoring err0 label in dwc3_probe

This label was removed by upstream commit 44feb8e6 ("usb: dwc3: use
local copy of resource to fix-up register offset") but we added a new
probe state which needs this error handling label again.

Fixes: fc0d4039c7bf ("MLK-18922-2 usb: dwc3: add OTG capabilities handling")

Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>