staging: rtl8192e: remove return from void function rtl92e_set_channel

Remove return from the void function rtl92e_set_channel.
Found by checkpatch.

WARNING: void function return statements are not generally useful

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Tested-by: Philipp Hortmann <philipp.g.hortmann@gmail.com>
Link: https://lore.kernel.org/r/20240201081824.6998-3-straube.linux@gmail.com


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