staging: lustre: ptlrpc: remove an unnecessary semicolon

Remove an unnecessary semicolon and remove a space before another one to
comply with coding style.

Fix the following type of checkpatch warning:
WARNING: space prohibited before semicolon

Signed-off-by: Kristina Martsenko <kristina.martsenko@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>