VPP commit fail message is not clear for `max-map-count` option
```
set system option kernel disable-mitigations
set system option kernel memory hugepage-size 2M hugepage-count '3072'
set vpp settings interface eth1 driver 'dpdk'
set vpp settings memory main-heap-size '4G'
```
commit:
```
vyos@r14# commit
[ vpp ]
The max_map_count must be greater than or equal to (2 * HugePages_Total)
[[vpp]] failed
Commit failed
[edit]
vyos@r14#
```
The option could be found under
```
set vpp settings host-resources max-map-count xxx
```
And probably it is a good idea to mention this and show the current value.
It is not clear what `max_map_count` is and where it should be configured.
Not sure if it is a bug or a feature.