Comment 2 for bug 1956575

According to the following advisory[1] from HP, this is a known issue which is fixed upstream :

"Advisory: Red Hat Enterprise Linux 8.3 - Guest Stops Responding at efi_mokvar_sysfs_init+0xa9/0x19d with AMD Secure Encrypted Virtualization (SEV) Enabled"

The upstream fix cited in the article is the following :

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=8d651ee9c71bb12fc0c8eb2786b66cbe5aa3e43b

x86/ioremap: Map EFI-reserved memory as encrypted for SEV

Adding this commit on top of kernel 5.4.0-92.103 does fix the booting issue.

[1] https://support.hpe.com/hpesc/public/docDisplay?docId=a00119071en_us&docLocale=en_US