ALSA: emu10k1: include FX send amounts in /proc output

It seems to make little sense to include the FX send routing, but not
the amounts.

This also simplifies the code somewhat, and lines up the output.

Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Link: https://lore.kernel.org/r/20230526101659.437969-5-oswald.buddenhagen@gmx.de


Signed-off-by: Takashi Iwai <tiwai@suse.de>