platform/x86: quickstart: Miscellaneous improvements

There is a mix of a few improvements to the driver.
I have done this instead of review, so it can quickly be
folded into the original code (partially or fully).

Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviewed-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20240327215208.649020-1-andy.shevchenko@gmail.com


Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>