LU-6202 utils: remove obsolete l_ioctl2() wrapper

LU-6202 utils: remove obsolete l_ioctl2() wrapper

The l_ioctl2() wrapper was only used for liblustre configuration,
so is obsolete since Lustre 2.3 or earlier.

Fixup whitespace in nearby code.

Signed-off-by: Andreas Dilger <adilger@whamcloud.com>
Change-Id: I3fd345bb36f51938ef297811ecee9f43483ebbe5
Reviewed-on: https://review.whamcloud.com/33693
Tested-by: Jenkins
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Shaun Tancheff <stancheff@cray.com>
Reviewed-by: Petros Koutoupis <pkoutoupis@cray.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>