create-ns: fix create-ns fail when -b 4096 while id-ns return nlbaf=1 and 0 for 512...

create-ns: fix create-ns fail when -b 4096 while id-ns return nlbaf=1 and 0 for 512, 1 for 4096

Fail case:
    sudo nvme create-ns /dev/nvme0 --nsze=1875366486   --ncap=937684566  --block-size=4096  --timeout=120000
        FLBAS corresponding to block size 4096 not found
        Please correct block size, or specify FLBAS directly

Signed-off-by: Wei Hou <wei.hou@scaleflux.com>