Remove either duplicate settings between arch & board, or just set
HAS_DTS at the arch level since all the boards for a given arch support
DTS now.
Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
two configs are contained in this board
* nsim_em: em with arc MPUv2
* nsim_sem: em with arc SecureShield and MPUv3
Signed-off-by: Wayne Ren <wei.ren@synopsys.com>