Staging: rtl8192u: ieee80211: remove odd backslash.

This backslash should be deleted - looks like leftover and not needed.

Signed-off-by: Dmitrii Wolf <dev.dragon@bk.ru>
Link: https://lore.kernel.org/r/20210411120301.6549-1-dev.dragon@bk.ru


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