[ARCH] use vmm_panic or vmm_hang whenever possible.

use vmm_panic() instead of vmm_printf(); vmm_hang(); use vmm_hang()
instead of while (1);

Signed-off-by: Anup Patel <anup@brainfault.org>
[CORE] use vmm_panic or vmm_hang whenever possible.

use vmm_panic() instead of vmm_printf(); vmm_hang(); use vmm_hang()
instead of while (1);

Signed-off-by: Anup Patel <anup@brainfault.org>