pflash_cfi01: Remove user_creatable flag

pflash_cfi01: Remove user_creatable flag

TYPE_CFI_PFLASH01 devices need to be mapped by
pflash_cfi01_register() (or equivalent) and can't be used with
-device. Remove user_creatable from the device class.

Cc: Kevin Wolf <[email protected]>
Cc: Max Reitz <[email protected]>
Cc: [email protected]
Cc: Laszlo Ersek <[email protected]>
Cc: Philippe Mathieu-Daudé <[email protected]>
Cc: Marcel Apfelbaum <[email protected]>
Reviewed-by: Philippe Mathieu-Daudé <[email protected]>
Reviewed-by: Laszlo Ersek <[email protected]>
Acked-by: Marcel Apfelbaum <[email protected]>
Signed-off-by: Eduardo Habkost <[email protected]>
Message-Id: <20170503203604[email protected]>
Signed-off-by: Eduardo Habkost <[email protected]>