LU-9859 libcfs: move remaining code from linux-module.c to module.c

LU-9859 libcfs: move remaining code from linux-module.c to module.c

There is no longer any need to keep this code separate,
and now we can remove linux-module.c

Linux-commit: 9604c7ac2005e214cb08500c957a79c58bea5c83

Test-Parameters: trivial

Change-Id: Ie2b905f5a79be17840ddfac0661c10332dc2667d
Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Reviewed-on: https://review.whamcloud.com/36510
Tested-by: jenkins <devops@whamcloud.com>
Tested-by: Maloo <maloo@whamcloud.com>
Reviewed-by: Neil Brown <neilb@suse.de>
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Yang Sheng <ys@whamcloud.com>