kernel: add aarch64 support

Basic commit to support Aarch64, 64-bit Arm platform

Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
kernel: set invalid syscall as -1 instead of 0

System call number 0 might be in use in selected syscalls.

Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
kernel: regen linux_syscall_numbers.h

Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
mem: shmt: set 16kb incrediment for Aarch64

Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>