3.18.y queue build failure on arm64 and x86_64

Hi Greg,

Patch "usb: dwc3: pci: Properly cleanup resource" uses the `err` label which doesn't exist on 3.18, causing a build failure on at least the architectures mentioned in the subject line with allyesconfig. Changing `goto err` to `goto err3` resolves the build failure. Would you like me to send the fixed up patch or you would prefer to make the change by hand? -- Harsh Shandilya, PRJKT Development LLC