SPM: Remove ARM platforms header from SPM common code

Common code mustn't include ARM platforms headers.

Change-Id: Ib6e4f5a77c2d095e6e8c3ad89c89cb1959cd3043
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

plat/arm/board/fvp/include/platform_def.h

@@ -8,6 +8,7 @@
 #define __PLATFORM_DEF_H__
 
 #include <arm_def.h>
+#include <arm_spm_def.h>
 #include <board_arm_def.h>
 #include <common_def.h>
 #include <tzc400.h>

services/std_svc/spm/secure_partition_setup.c

@@ -6,7 +6,6 @@
 
 #include <arch.h>
 #include <arch_helpers.h>
-#include <arm_spm_def.h>
 #include <assert.h>
 #include <common_def.h>
 #include <context.h>