Staging: ft1000-usb: Fix call to obsolete function

strict_strtoul is obsolete and should be replaced with
kstrto* function as reported by checkpatch.pl.
pInfo->CardNumber is a u8. This is why kstrtou8 should be
used here.

Signed-off-by: Kurt Kanzenbach <shifty91@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>