90kernel-modules: update for xhci module split in kernel 3.18

90kernel-modules: update for xhci module split in kernel 3.18

As reported in https://bugs.mageia.org/show_bug.cgi?id=14799

the xhci module got splitted up in upstream linux merged during
3.18 release cycle:

>From 29e409f0f7613f9fd2235e41f0fa33e48e94544e Mon Sep 17 00:00:00 2001
From: Andrew Bresticker <abrestic@chromium.org>
Date: Fri, 3 Oct 2014 11:35:29 +0300
Subject: xhci: Allow xHCI drivers to be built as separate modules

so we need to adjust 90kernel-modules accordingly.

Signed-off-by: Thomas Backlund <tmb@mageia.org>