console: Fix typo
console: Fix typo

Fix typo that led to the following error:

```
repos/apache-mynewt-core/sys/console/minimal/src/console.c:135:19:
error: 'promot' undeclared (first use in this function); did you mean 'prompt'?
     console_write(promot, strlen(prompt));
```

Signed-off-by: Naveen Kaje <79e427f88b1293e6ef90566b3bd0a85565336125@juul.com>

mlaz/mynewt-core,mlaz/mynewt-core,mlaz/mynewt-core,mlaz/mynewt-core,mlaz/mynewt-core