staging: greybus: remove unnecessary blank line

Remove unnecessary blank line before struct as reported
by checkpatch:

" CHECK: Please don't use multiple blank lines "

Signed-off-by: Menna Mahmoud <eng.mennamahmoud.mm@gmail.com>
Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Link: https://lore.kernel.org/r/20230322113735.31214-1-eng.mennamahmoud.mm@gmail.com


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