hw/usb/ccid: Make ccid_card_init() take an error parameter

hw/usb/ccid: Make ccid_card_init() take an error parameter

Replace init() of CCIDCardClass with realize, then convert
ccid_card_init(), ccid_card_initfn() and it's callbacks to
take an Error** in ordor to report the error more clearly.

Signed-off-by: Mao Zhongyi <[email protected]>
Signed-off-by: Cao jin <[email protected]>
Signed-off-by: Philippe Mathieu-Daudé <[email protected]>
Message-id: 20180125171432[email protected]
[PMD: fixed s->card assignation in ccid_card_realize()]
Signed-off-by: Philippe Mathieu-Daudé <[email protected]>
Signed-off-by: Gerd Hoffmann <[email protected]>