ALSA: ump: Update rawmidi name per EP name update

The rawmidi name string should be updated dynamically when the device
receives the UMP EP name update, too.  Both the core and legacy
rawmidi names are updated.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Link: https://patch.msgid.link/20250110155943.31578-7-tiwai@suse.de