[RFC v2 1/2] ARM: cpu: add "reset_hivecs" property (high vectors on [RFC v2 2/2] ARM: arm_cpu_reset: make possible to use high vectors
Changes since v1: * rebase over Peter Crosthwaite's "Fix Support for ARM A9 CBAR" v3 series; * rewrite according to Peter Crosthwaite's and Peter Maydell's comments.
