Staging: lustre: lustre: obdecho: Add blank line after declarations

The following patch fixes the checkpatch.pl warning:
drivers/staging/lustre/lustre/obdecho/echo_client.c WARNING: Missing a blank line after declarations

Signed-off-by: Hatice ERTURK <haticeerturk27@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>