target-arm: Add extended RVBAR support Added RVBAR_EL2 and RVBAR_EL3 CP register support. All RVBAR_EL# registers point to the same location and only the highest EL version exists at any one time. Signed-off-by: Greg Bellows <greg.bellows@linaro.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1422029835-4696-3-git-send-email-greg.bellows@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>