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/rockchip/common/include/plat_private.h b/plat/rockchip/common/include/plat_private.h
index 9041bdb..714a8bf 100644
--- a/plat/rockchip/common/include/plat_private.h
+++ b/plat/rockchip/common/include/plat_private.h
@@ -60,16 +60,7 @@
 /******************************************************************************
  * Function and variable prototypes
  *****************************************************************************/
-#ifdef AARCH32
-void plat_configure_mmu_svc_mon(unsigned long total_base,
-				unsigned long total_size,
-				unsigned long,
-				unsigned long,
-				unsigned long,
-				unsigned long);
-
-void rockchip_plat_mmu_svc_mon(void);
-#else
+#ifdef __aarch64__
 void plat_configure_mmu_el3(unsigned long total_base,
 			    unsigned long total_size,
 			    unsigned long,
@@ -78,6 +69,15 @@
 			    unsigned long);
 
 void rockchip_plat_mmu_el3(void);
+#else
+void plat_configure_mmu_svc_mon(unsigned long total_base,
+				unsigned long total_size,
+				unsigned long,
+				unsigned long,
+				unsigned long,
+				unsigned long);
+
+void rockchip_plat_mmu_svc_mon(void);
 #endif
 
 void plat_cci_init(void);