Staging: rtl8192u: Simplify if condition.

Remove unnecessary TRUE statement. Fields bDynamicTxLowPower and
bDynamicTxHighPower are of bool type so such change is correct.

Signed-off-by: Ksenija Stanojevic <ksenija.stanojevic@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>