LU-17000 lnet: lnet_inet_enumerate krealloc and kfree

LU-17000 lnet: lnet_inet_enumerate krealloc and kfree

CoverityID: 442369  ("Memory - corruptions, double free")
On realloc() failure free 'ifaces' which may already differ from
*dev_list due to a previous realloc(). Also nalloc is now zero.

CoverityID: 442378 ("Resource Leak")
Ensure lnet_inet_enumerate() ifaces are freed.

Signed-off-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Change-Id: I2d2762d86fcf070387b100115ad3a50bd2b2840b
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/56150
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Frank Sehr <fsehr@whamcloud.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Reviewed-by: Chris Horn <chris.horn@hpe.com>