staging: rtl8192e: Rename rtState

Rename variable rtState to rt_state to avoid CamelCase which
is not accepted by checkpatch.pl.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/e888fa7e6edaa68e741236ea012f8230f6817882.1662402870.git.philipp.g.hortmann@gmail.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>