fix: attributes for ns memory region

Cactus SP was using the wrong attribute value to use a memory region as
non-secure.

Signed-off-by: J-Alves <joao.alves@arm.com>
Change-Id: Ide881e4b99c792e0c7486aad5d8e5d8001505ca1
diff --git a/spm/cactus/plat/arm/fvp/fdts/cactus-tertiary.dts b/spm/cactus/plat/arm/fvp/fdts/cactus-tertiary.dts
index a5b0062..a9d5e50 100644
--- a/spm/cactus/plat/arm/fvp/fdts/cactus-tertiary.dts
+++ b/spm/cactus/plat/arm/fvp/fdts/cactus-tertiary.dts
@@ -48,7 +48,7 @@
 			description = "NS share memory";
 			pages-count = <1>;
 			base-address = <0x00008800 0x80001000>;
-			attributes = <0x83>; /* NS / read-write */
+			attributes = <0xb>; /* NS / read-write */
 		};
 	};
 };