plat/arm: scp: Move to drivers/ folder

Change-Id: Ida5dae39478654405d0ee31a6cbddb4579e76a7f
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>
diff --git a/plat/arm/css/common/css_pm.c b/plat/arm/css/common/css_pm.c
index 47412df..f6fc6aa 100644
--- a/plat/arm/css/common/css_pm.c
+++ b/plat/arm/css/common/css_pm.c
@@ -11,13 +11,12 @@
 
 #include <arch_helpers.h>
 #include <common/debug.h>
+#include <drivers/arm/css/css_scp.h>
 #include <lib/cassert.h>
 #include <plat/arm/common/plat_arm.h>
 #include <plat/arm/css/common/css_pm.h>
 #include <plat/common/platform.h>
 
-#include "../drivers/scp/css_scp.h"
-
 /* Allow CSS platforms to override `plat_arm_psci_pm_ops` */
 #pragma weak plat_arm_psci_pm_ops