staging: rtl8192e: Remove entry .tx_fill_descr.. from struct rtl819x_ops

Remove entry .tx_fill_descriptor and replace it with function name
rtl92e_fill_tx_desc. This increases readability of the code.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/1ae7d44ef74dc6cb61ff43f670b21d702403d7fb.1676840647.git.philipp.g.hortmann@gmail.com


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