nvic: Make systick banked
For the v8M security extension, there should be two systick devices, which use separate banked systick exceptions. The register interface is banked in the same way as for other banked registers, including the existence of an NS alias region for secure code to access the nonsecure timer. Signed-off-by: NPeter Maydell <peter.maydell@linaro.org> Reviewed-by: NPhilippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 1512154296-5652-3-git-send-email-peter.maydell@linaro.org
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