staging: rtl8192e: Remove priv->rf_chip in _rtl92e_phy_rf_write

priv->rf_chip is initialized to RF_8256 and never changed. Remove
conditions in function _rtl92e_phy_rf_write as those are dead code.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/77628b7ecade212401d7da5e3c0b79f8ef55b5c1.1679732276.git.philipp.g.hortmann@gmail.com


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