kernel-parameters does not accept single-word config options, specifying them causes reboot-loops

**Image I'm using:**
bottlerocket-aws-k8s-1.29-x86_64-v1.19.4

**What I expected to happen:**

I want to turn off SMT in the kernel via `settings.boot.kernel-parameters`
This is *not* a key-value pair.

```
[settings.boot]
reboot-to-reconcile = true

[settings.boot.kernel-parameters]
"nosmt" = []
# "nosmt"
```

**What actually happened:**

The config does not seem to accept anything other than `key = value`, and there are many kernel config options that are only `key`.

The system goes into a reboot loop if I leave an empty value array.

**How to reproduce the problem:**

Use one or other of the options below.
```
[settings.boot]
reboot-to-reconcile = true

[settings.boot.kernel-parameters]
"nosmt" = []
# "nosmt"
```