LU-6142 llite: ll_lookup_finish_locks clean up

LU-6142 llite: ll_lookup_finish_locks clean up

The 'inode' var can be used rather than dereferencing dentry->d_inode
a second time.
Also re-indent the function.

Signed-off-by: Mr NeilBrown <neilb@suse.de>
Change-Id: I16fb5480f7e2a8192a82e0c821597e14aad00b40
Reviewed-on: https://review.whamcloud.com/40830
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Lai Siyao <lai.siyao@whamcloud.com>
Reviewed-by: Aurelien Degremont <degremoa@amazon.com>
Reviewed-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Reviewed-by: Oleg Drokin <green@whamcloud.com>