Add support for debug communications channel based
hvc console for arm64 cpus.
Signed-off-by: NAbhimanyu Kapur <abhimany@codeaurora.org>
Signed-off-by: NTimur Tabi <timur@codeaurora.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>