staging: lustre: Delete unnecessary goto statements in six functions

Six goto statements referred to a source code position
directly behind them.
Thus omit such unnecessary jumps.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>