drivers: staging: rtl8187se: fixed broken indentation

A section of code in the function rtl8180_tx was indented for no reason,
causing numerous checkpatch.pl warnings.

Signed-off-by: Axel Rasmussen <axel.rasmussen1@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>