Description: display frontend "be-alloc" mode is unsupported
References:
 https://xenbits.xen.org/xsa/advisory-363.html
 https://lore.kernel.org/lkml/20210216124015.28923-1-jgross@suse.com/
Notes:
 carnil> The update only marks the driver as not supported (in src:xen),
 carnil> so might be ignored overall.
Bugs:
upstream: ignored "Xen project patched only documentation mostly relevant to Xen project"
5.10-upstream-stable: ignored "Xen project patched only documentation mostly relevant to Xen project"
4.19-upstream-stable: ignored "Xen project patched only documentation mostly relevant to Xen project"
4.9-upstream-stable: N/A "Affected code not present"
sid: ignored "Xen project patched only documentation mostly relevant to Xen project"
4.19-buster-security: ignored "Xen project patched only documentation mostly relevant to Xen project"
4.9-stretch-security: N/A "Affected code not present"