When I said in I8594d1fe05242f246a5809740a115ab2f84ac5a3 that 12 MiB
ought to be enough, I should have expected that I would be proven wrong.
While 12 MiB is enough to fit shim-x64 and grub2-efi-x64, yum fails to
update these packages to newer versions:
Transaction check error:
installing package shim-x64-15-2.el7.centos.x86_64 needs 7MB on the /boot/efi filesystem
installing package grub2-efi-x64-1:2.02-0.76.el7.centos.1.x86_64 needs 3MB on the /boot/efi filesystem
Error Summary
-------------
Disk Requirements:
At least 7MB more space needed on the /boot/efi filesystem.
It is recommended that the ESP partition be much bigger. This commit
bumps its size to 550MiB, following guidelines from Rod Smith to avoid
incompatibilities with some EFIs [1].
[1] https://www.rodsbooks.com/efi-bootloaders/principles.html
Change-Id: If9515234f1a803cda32b2482f8abe10ddf0e6d26
