Fix a typo in the 32-bit ARM version of the GICv3 driver, which uses the wrong system register encoding to access ICC_IAR1, and attempted to access ICC_IAR0 instead. This results in boot time hangs both under QEMU emulation and on real hardware. Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>