Pull irq fix from Thomas Gleixner:
"A single commit to handle an erratum in Cavium ThunderX to prevent
access to GIC registers which are broken in the implementation"
* tag 'irq-urgent-2020-03-15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
irqchip/gic-v3: Workaround Cavium erratum 38539 when reading GICD_TYPER2