staging:ozwpan:Fix sparse warning of incorrect argument type

This patch fixes the following sparse warning:
drivers/staging/ozwpan/ozusbsvc1.c:208:50: warning: incorrect type in argument 6 (different base types)
drivers/staging/ozwpan/ozusbsvc1.c:208:50:    expected unsigned short [unsigned] [usertype] windex
drivers/staging/ozwpan/ozusbsvc1.c:208:50:    got restricted __le16 [usertype] wIndex

Signed-off-by: Himangi Saraogi <himangi774@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>