The attached patch fixes this.

----- Forwarded message from Ben Hutchings <ben@decadent.org.uk> -----

From: Ben Hutchings <ben@decadent.org.uk>
To: Debian Bug Tracking System <submit@bugs.debian.org>
Subject: Bug#970871: "modinfo -F" always shows name for built-ins

Package: kmod
Version: 27+20200310-2
Severity: normal

Now that the kernel provides module information for potentially
modular code that's actually built-in, it's possible to query these
built-ins with "modinfo -F".  However, this doesn't work quite right:

$ modinfo -Flicense e1000e
GPL v2
$ modinfo -Flicense bitrev
name:           bitrev
GPL

Ben.

-- System Information:
Debian Release: bullseye/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'stable-updates'), (500, 'unstable'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 5.8.0-1-amd64 (SMP w/2 CPU threads)
Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages kmod depends on:
ii  libc6      2.31-3
ii  libkmod2   27+20200310-2
ii  liblzma5   5.2.4-1+b1
ii  libssl1.1  1.1.1g-1
ii  lsb-base   11.1.0

kmod recommends no packages.

kmod suggests no packages.

-- no debconf information

----- End forwarded message -----

-- 
ciao,
Marco