Merge branch '2021-04-20-assorted-improvements'
- ARM64 GIC fix, CONFIG_IRQ now moved to Kconfig - IDE, lz4 fixes - octeontx cleanups / enhancements - highbank DM migration - psci updates - Enable use of -fstack-protector
- ARM64 GIC fix, CONFIG_IRQ now moved to Kconfig - IDE, lz4 fixes - octeontx cleanups / enhancements - highbank DM migration - psci updates - Enable use of -fstack-protector