usb: typec: pd: no opencoding of FIELD_GET

If we have a neat macro, at least new code should
use it.

Signed-off-by: Oliver Neukum <oneukum@suse.com>
Link: https://lore.kernel.org/r/20240229131851.16148-2-oneukum@suse.com


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>