mkfs: resolve sector size CLI conflicts

mkfs: resolve sector size CLI conflicts

Now we have a two dimensional conflict array, convert the sector
size CLI option conflict determination to use it. To get the error
specification just right, we also need to tweak how we store
and validate the sector size CLI parameter state in the options
table.

Old:

$ mkfs.xfs -N -s size=4k -d sectsize=512 /dev/pmem0
Cannot specify both -d sectsize and -d sectlog
.....

New:

$ mkfs.xfs -N -s size=4k -d sectsize=512 /dev/pmem0
Cannot specify both -s size and -d sectsize
.....

Signed-Off-By: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Eric Sandeen <sandeen@sandeen.net>
Signed-off-by: Eric Sandeen <sandeen@sandeen.net>