Replace __ASSEMBLY__ with compiler-builtin __ASSEMBLER__

NOTE: __ASSEMBLY__ macro is now deprecated in favor of __ASSEMBLER__.

All common C compilers predefine a macro called __ASSEMBLER__ when
preprocessing a .S file. There is no reason for TF-A to define it's own
__ASSEMBLY__ macro for this purpose instead. To unify code with the
export headers (which use __ASSEMBLER__ to avoid one extra dependency),
let's deprecate __ASSEMBLY__ and switch the code base over to the
predefined standard.

Change-Id: Id7d0ec8cf330195da80499c68562b65cb5ab7417
Signed-off-by: Julius Werner <jwerner@chromium.org>
diff --git a/plat/st/stm32mp1/stm32mp1_def.h b/plat/st/stm32mp1/stm32mp1_def.h
index 94c4c5b..37941aa 100644
--- a/plat/st/stm32mp1/stm32mp1_def.h
+++ b/plat/st/stm32mp1/stm32mp1_def.h
@@ -14,7 +14,7 @@
 #include <lib/utils_def.h>
 #include <lib/xlat_tables/xlat_tables_defs.h>
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 #include <drivers/st/stm32mp1_clk.h>
 
 #include <boot_api.h>
@@ -40,7 +40,7 @@
 #endif
 
 /* DDR power initializations */
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 enum ddr_type {
 	STM32MP_DDR3,
 	STM32MP_LPDDR2,
@@ -254,7 +254,7 @@
 #define TAMP_BASE			U(0x5C00A000)
 #define TAMP_BKP_REGISTER_BASE		(TAMP_BASE + U(0x100))
 
-#if !(defined(__LINKER__) || defined(__ASSEMBLY__))
+#if !(defined(__LINKER__) || defined(__ASSEMBLER__))
 static inline uint32_t tamp_bkpr(uint32_t idx)
 {
 	return TAMP_BKP_REGISTER_BASE + (idx << 2);