staging: rtl8192e: Remove _rtl92e_get_supported_wireless_mode

Remove _rtl92e_get_supported_wireless_mode to improve readability.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/f8470fff23d5870cbcda3d6f4978ba17016a8fe8.1679949171.git.philipp.g.hortmann@gmail.com


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