Possible bug for ubuntu 20.04 with CONFIG_SND_MAX_CARDS=256

[Olivier SCHMITT]

Hello dear all,

I have been compiling kernels for a long time with CONFIG_SND_MAX_CARDS 
= 256 and increasing the sample rate.
I switched to ubuntu 20.04 server lts.

Everything is working fine until I compile alsa-lib.

git clone git: //git.alsa-project.org/alsa-lib.git alsa-lib
./gitcompile --with-max-cards = 256

But after the make install, the plughw, dmix and dnsoop disappear.

Do you have an idea? I uploaded alsa-info on:

http://alsa-project.org/db/?f=8860b8bbb5abd5a84d3002717d68206db7da4a9c

Thanks in advance.