staging: rtl8723bs: remove rf type branching (fourth patch)

remove all function calls to rtw_get_hw_reg made to
read HW_VAR_RF_TYPE and get value of rt_type, which
is always 1T1R. Clean up code on removal sites,
keeping 1T1R code unconditionally.

Signed-off-by: Fabio Aiuto <fabioaiuto83@gmail.com>
Link: https://lore.kernel.org/r/8ca2f788c42d81b9cb4dbc46e23c7549dc27d081.1628329348.git.fabioaiuto83@gmail.com


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