staging: octeon: add blank line after union

add a blank line after union declaration to fix checkpatch.pl warning

Signed-off-by: Kaaira Gupta <kgupta@es.iitr.ac.in>
Link: https://lore.kernel.org/r/20200220195654.GA14056@kaaira-HP-Pavilion-Notebook


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