staging: rtl8192e: remove rf_type from struct r8192_priv

The field rf_type of struct r8192_priv is always RF_1T2R and only used
in one place. Use RF_1T2R directly there and remove rf_type from struct
r8192_priv.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/20230325132823.22872-5-straube.linux@gmail.com


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