staging: rtl8192e: Remove 5G wireless_mode in rtl92e_set_wireless_mode

Remove wireless_mode == WIRELESS_MODE_N_5G as 5G is not supported by
hardware and to improve readability.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/693a34b187f21d9d48accd3b0b953dff2f0795eb.1679949171.git.philipp.g.hortmann@gmail.com


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