staging: rtl8192e: Remove priv->rf_chip in _rtl92e_phy_switch_channel_step

priv->rf_chip is initialized to RF_8256 and never changed. Remove
condition in function _rtl92e_phy_switch_channel_step as it is dead code.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/1b9e10de4f539aa24150275c80ec4bbd925c853d.1679732276.git.philipp.g.hortmann@gmail.com


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