Switch AARCH32/AARCH64 to __aarch64__

NOTE: AARCH32/AARCH64 macros are now deprecated in favor of __aarch64__.

All common C compilers pre-define the same macros to signal which
architecture the code is being compiled for: __arm__ for AArch32 (or
earlier versions) and __aarch64__ for AArch64. There's no need for TF-A
to define its own custom macros for this. In order to unify code with
the export headers (which use __aarch64__ to avoid another dependency),
let's deprecate the AARCH32 and AARCH64 macros and switch the code base
over to the pre-defined standard macro. (Since it is somewhat
unintuitive that __arm__ only means AArch32, let's standardize on only
using __aarch64__.)

Change-Id: Ic77de4b052297d77f38fc95f95f65a8ee70cf200
Signed-off-by: Julius Werner <jwerner@chromium.org>
diff --git a/drivers/arm/ccn/ccn.c b/drivers/arm/ccn/ccn.c
index d184054..d0c5abc 100644
--- a/drivers/arm/ccn/ccn.c
+++ b/drivers/arm/ccn/ccn.c
@@ -17,7 +17,7 @@
 #include "ccn_private.h"
 
 static const ccn_desc_t *ccn_plat_desc;
-#if defined(IMAGE_BL31) || (defined(AARCH32) && defined(IMAGE_BL32))
+#if defined(IMAGE_BL31) || (!defined(__aarch64__) && defined(IMAGE_BL32))
 DEFINE_BAKERY_LOCK(ccn_lock);
 #endif
 
@@ -264,7 +264,7 @@
 	assert(ccn_plat_desc);
 	assert(ccn_plat_desc->periphbase);
 
-#if defined(IMAGE_BL31) || (defined(AARCH32) && defined(IMAGE_BL32))
+#if defined(IMAGE_BL31) || (!defined(__aarch64__) && defined(IMAGE_BL32))
 	bakery_lock_get(&ccn_lock);
 #endif
 	start_region_id = region_id;
@@ -284,7 +284,7 @@
 						   rn_id_map);
 	}
 
-#if defined(IMAGE_BL31) || (defined(AARCH32) && defined(IMAGE_BL32))
+#if defined(IMAGE_BL31) || (!defined(__aarch64__) && defined(IMAGE_BL32))
 	bakery_lock_release(&ccn_lock);
 #endif
 }