Staging: comedi: Added blank lines to fix coding style issue

Fixed a coding style issue by adding a blank line after declarations

Signed-off-by: Divyansh Kamboj <kambojdivyansh2000@gmail.com>
Link: https://lore.kernel.org/r/20200605032140.31287-1-kambojdivyansh2000@gmail.com


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