[ALSA] au88x0 - Init before create components

Change the order in vortex_probe to set the card details before creating the
components, meaning for example that card->shortname is available when
registering the midi port.
I have also added extra to card->shortname, and a line to overwrite the midi
name following snd_mpu401_uart_new.

Signed-off-by: Alan Horstmann <gineera@aspect135.co.uk>
Signed-off-by: Takashi Iwai <tiwai@suse.de>