ALSA: usb-audio: Improve filtering of sample rates on Focusrite devices

Previously we were filtering out only upper unsupported sampling rates.
This patch adds filtering of the lower unsupported sampling rates. As a
result there is 1:1 mapping between altsetting and supported rates.

The issue was found on a Scarlett 3rd Gen card (see linked bug), but the
same filtering is likely needed for the Scarlett 1st and 2nd Gen as well
as the older Clarett cards which lacks Valid Alternate Setting Control.

Patch was not tested on a real hardware.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=214493


Signed-off-by: Alexander Tsoy <alexander@tsoy.me>
Link: https://patch.msgid.link/20250630013357.1327420-1-alexander@tsoy.me


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