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/plat/qemu/qemu_bl1_setup.c b/plat/qemu/qemu_bl1_setup.c
index b582151..67f3327 100644
--- a/plat/qemu/qemu_bl1_setup.c
+++ b/plat/qemu/qemu_bl1_setup.c
@@ -41,10 +41,10 @@
  * does basic initialization. Later architectural setup (bl1_arch_setup())
  * does not do anything platform specific.
  *****************************************************************************/
-#ifdef AARCH32
-#define QEMU_CONFIGURE_BL1_MMU(...)	qemu_configure_mmu_svc_mon(__VA_ARGS__)
-#else
+#ifdef __aarch64__
 #define QEMU_CONFIGURE_BL1_MMU(...)	qemu_configure_mmu_el3(__VA_ARGS__)
+#else
+#define QEMU_CONFIGURE_BL1_MMU(...)	qemu_configure_mmu_svc_mon(__VA_ARGS__)
 #endif
 
 void bl1_plat_arch_setup(void)