Add the CPU interface registers which deal with acknowledging
and dismissing interrupts.
Signed-off-by: NPeter Maydell <peter.maydell@linaro.org>
Reviewed-by: NShannon Zhao <shannon.zhao@linaro.org>
Tested-by: NShannon Zhao <shannon.zhao@linaro.org>
Message-id: 1465915112-29272-19-git-send-email-peter.maydell@linaro.org