staging: rtl8192u: fix spacing in ieee80211

Checkpatch emits several errors, warnings, and checks about spacing.
Apply checkpatch's suggested spacing rules.

Signed-off-by: Stephen Brennan <stephen@brennan.io>
Link: https://lore.kernel.org/r/20190821143540.4501-4-stephen@brennan.io


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