staging: rtl8188eu: remove blank lines in header files

Remove blank lines in header files to clear checkpatch issues.
CHECK: Please don't use multiple blank lines

Signed-off-by: Michael Straube <straube.linux@gmail.com>
Link: https://lore.kernel.org/r/20200627090600.21354-1-straube.linux@gmail.com


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