staging: rtl8192e: Remove entry .link_change from struct rtl819x_ops

Remove entry .link_change and replace it with function name
rtl92e_link_change. This increases readability of the code.

Signed-off-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/9b451317eb4c13db007476c30212ffb09ced2356.1677010997.git.philipp.g.hortmann@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>