plat/arm: scmi: Move to drivers/ folder

Change-Id: I8989d2aa0258bf3b50a856c5b81532d578600124
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
diff --git a/plat/arm/board/n1sdp/n1sdp_bl31_setup.c b/plat/arm/board/n1sdp/n1sdp_bl31_setup.c
index 93f2803..a1669b9 100644
--- a/plat/arm/board/n1sdp/n1sdp_bl31_setup.c
+++ b/plat/arm/board/n1sdp/n1sdp_bl31_setup.c
@@ -6,9 +6,9 @@
 
 #include <platform_def.h>
 
+#include <drivers/arm/css/scmi.h>
 #include <plat/arm/common/plat_arm.h>
 
-#include "../../css/drivers/scmi/scmi.h"
 #include "../../css/drivers/mhu/css_mhu_doorbell.h"
 
 static scmi_channel_plat_info_t n1sdp_scmi_plat_info = {