ALSA: emu10k1: fix support for 24 kHz capture

We need to specify that the hardware supports non-standard rates, as
otherwise the sound core creates a constraint which limits the rate to
the specified standard rates. That also made the rate constraint we were
already adding meaningless.

Signed-off-by: Oswald Buddenhagen <oswald.buddenhagen@gmx.de>
Link: https://lore.kernel.org/r/20230523200709.236059-3-oswald.buddenhagen@gmx.de


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