SUSE-SU-2020:3283-1 Security update for u-boot

This update for u-boot fixes the following issues: - Fix network boot on Raspberry Pi 3 B+ bsc1098649 - Fix GOP pixel format bsc1098447 - Fix SD writes on Raspberry Pi - Enable a few more armv7 boards to boot with EFI - Fix potentially miscompiled runtime service calls Fix CVE-2019-14192...