Does it work as User with:
SDL_AUDIODRIVER=alsa ./mame
You must be in the directory where the mame bin is installed.
PS:
You have 3 Repos with the same URL, you can delete two of them:
i+ | alsa-plugins-pulse | package | 1.2.5-1.1 | x86_64 | openSUSE:Tumbleweed
i+ | alsa-plugins-pulse | package | 1.2.5-1.1 | x86_64 | openSUSE:Factory
i+ | alsa-plugins-pulse | package | 1.2.5-1.1 | x86_64 | repo-oss
But has nothing to do with the problem.