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/cache_llc.h b/include/drivers/marvell/cache_llc.h
index 1aa4c88..85babb8 100644
--- a/include/drivers/marvell/cache_llc.h
+++ b/include/drivers/marvell/cache_llc.h
@@ -27,7 +27,7 @@
 #define LLC_EXCLUSIVE_EN		0x100
 #define LLC_WAY_MASK			0xFFFFFFFF
 
-#ifndef __ASSEMBLY__
+#ifndef __ASSEMBLER__
 void llc_cache_sync(int ap_index);
 void llc_flush_all(int ap_index);
 void llc_clean_all(int ap_index);