Use __ASSEMBLY__ as the assembly macros

Some places use __ASSEMBLER__ instead which does not work since the
Makefile does not define it. Fix them.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/include/elf.h b/include/elf.h
index e7c5198..b04e746 100644
--- a/include/elf.h
+++ b/include/elf.h
@@ -9,7 +9,7 @@
 #ifndef _ELF_H
 #define _ELF_H
 
-#ifndef __ASSEMBLER__
+#ifndef __ASSEMBLY__
 #include "compiler.h"
 
 /* This version doesn't work for 64-bit ABIs - Erik */
@@ -690,7 +690,7 @@
 #define R_RISCV_64		2
 #define R_RISCV_RELATIVE	3
 
-#ifndef __ASSEMBLER__
+#ifndef __ASSEMBLY__
 int valid_elf_image(unsigned long addr);
 unsigned long load_elf64_image_phdr(unsigned long addr);
 unsigned long load_elf64_image_shdr(unsigned long addr);