USB: core: only clean up what we allocated

When cleaning up the configurations, make sure we only free the number
of configurations and interfaces that we could have allocated.

Change-Id: I07a2ddd088264030544284ad9680cd6d2b538d21
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Git-commit: 32fd87b3bbf5f7a045546401dfe2894dbbf4d8c3
Git-repo: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git


Signed-off-by: Srinivasa Rao Kuppala <srkupp@codeaurora.org>