staging: rtl8188eu: replace tabs with spaces - style

Replace tabs with spaces where appropriate to cleanup whitespace.

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20191027130604.68379-4-straube.linux@gmail.com


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