The recent extension added a new ALSA sequencer port info flag bit
SNDRV_SEQ_PORT_FLG_IS_MIDI1, but it's not reported back when
inquired.  Fix it to report properly.

Fixes: 0079c9d1 ("ALSA: ump: Handle MIDI 1.0 Function Block in MIDI 2.0 protocol")
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20240807092303.1935-7-tiwai@suse.de