Security update for microcode_ctl

Open Source Vulnerabilities SUSE-SU-2021:14758-1

This update for microcode_ctl fixes the following issues: Updated to Intel CPU Microcode 20210525 release: - CVE-2020-24513: A domain bypass transient execution vulnerability was discovered on some Intel Atom processors that use a micro-architectural incident channel. (bsc#1179833) - CVE-2020-24511: The IBRS feature to mitigate Spectre variant 2 transient execution side channel vulnerabilities may not fully prevent non-root (guest) branches from controlling the branch predictions of the root (host) (bsc#1179836) - CVE-2020-24512: Fixed trivial data value cache-lines such as all-zero value cache-lines may lead to changes in cache-allocation or write-back behavior for such cache-lines (bsc#1179837) - CVE-2020-24489: Fixed Intel VT-d device pass through potential local privilege escalation (bsc#1179839)