xtensa: display core ID registers

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
xtensa: fix boot and startup performance for MMUv3 configuration

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
xtensa: fix build issues

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>