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/include/drivers/marvell/ccu.h b/include/drivers/marvell/ccu.h
index 546d9f1..b0d1ec9 100644
--- a/include/drivers/marvell/ccu.h
+++ b/include/drivers/marvell/ccu.h
@@ -10,7 +10,7 @@
 #ifndef CCU_H
 #define CCU_H
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 #include <drivers/marvell/addr_map.h>
 #endif
 
@@ -36,7 +36,7 @@
 
 #define CCU_SRAM_WIN_CR				CCU_WIN_CR_OFFSET(MVEBU_AP0, 1)
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 int init_ccu(int);
 void ccu_win_check(struct addr_map_win *win);
 void ccu_enable_win(int ap_index, struct addr_map_win *win, uint32_t win_id);