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));
```
@@ -132,7 +132,7 @@ console_out(int c)
void
console_prompt_set(const char *prompt, const char *line)
{
- console_write(promot, strlen(prompt));
+ console_write(prompt, strlen(prompt));
if (line) {
console_write(line, strlen(line));
}
