staging:rtl8192u: Remove unused definition of sQoSCtlLng - Style

Remove sQoSCtlLng. The constant sQoSCtlLng is never used in code so has
been removed. This is a coding style change so should have no impact on
runtime code execution.

Signed-off-by: John Whitmore <johnfwhitmore@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>