staging: media: omap4iss: Fixes missing blank line warning.

Fixes "Missing a blank line after declarations" checkpatch.pl warning in
iss_csi2.c

Signed-off-by: Gulsah Kose <gulsah.1004@gmail.com>
Acked-by: Daniel Baluta <daniel.baluta@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>