backports: usb_translate_errors() is needed for < 3.2

backports: usb_translate_errors() is needed for < 3.2

usb_translate_errors() is needed for every kernel < 3.2 and not <
2.6.39.

This fixes a problem introduced in this commit:
commit aee2dc1d7fd03d3900e06e88793b519e21049de0
Author: Patrick Ziegler <patrick.ziegler@fh-kl.de>
Date:   Thu Aug 15 14:40:20 2013 +0200

    backports: add usb_translate_errors()

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Cc: Patrick Ziegler <patrick.ziegler@fh-kl.de>
Signed-off-by: Luis R. Rodriguez <mcgrof@do-not-panic.com>