staging: rtl8192e: remove RTL819X_DEFAULT_RF_TYPE

Remove RTL819X_DEFAULT_RF_TYPE and use RF_1T2R directly to make
follow up patches, which will remove priv->rf_type, easier to review.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/20230325132823.22872-2-straube.linux@gmail.com


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