[ALSA] ice1712 - Set mpu401 info flags from _card_info

To permit use, in ice1712, of the mpu401 info flags recently added to
mpu401_uart, adds info_flags in snd_ice1712_card_info so that additional
flags can be set, if desired.  'MPU401_INFO_INTEGRATED' is always set with
the ice1712.  The flags are passed on to snd_mpu401_uart_new().
_INFO_OUTPUT is set for DMX6fire mpu2.

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