package u-boot-rpi:armhf 2016.01+dfsg1-2ubuntu3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Dinho Zanardi]

https://bugs.launchpad.net/ubuntu/+source/u-boot/+filebug/365ff656-a3d5-11e8-a96e-68b5996a96c8?field.title=package+u-boot-rpi%3Aarmhf+2016.01%2Bdfsg1-2ubuntu3+failed+to+install%2Fupgrade%3A+subprocess+installed+post-installation+script+returned+error+exit+status+1

ProblemType: Package
DistroRelease: Ubuntu 16.04
Package: u-boot-rpi:armhf 2016.01+dfsg1-2ubuntu3
Uname: Linux 4.9.26v7-aufs armv7l
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: armhf
Date: Sun Aug 19 14:24:05 2018
Dependencies:

DuplicateSignature:
 package:u-boot-rpi:armhf:2016.01+dfsg1-2ubuntu3
 Setting up linux-firmware-raspi2 (1.20161020-0ubuntu1~0.1) ...
 Error: missing /boot/firmware, did you forget to mount it?
 dpkg: error processing package linux-firmware-raspi2 (--configure):
  subprocess installed post-installation script returned error exit status 1
ErrorMessage: subprocess installed post-installation script returned error exit status 1
RelatedPackageVersions:
 dpkg 1.18.4ubuntu1.4
 apt 1.2.27
SourcePackage: u-boot
Title: package u-boot-rpi:armhf 2016.01+dfsg1-2ubuntu3 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
UpgradeStatus: Upgraded to xenial on 2018-08-19 (0 days ago)