use ASM_NL instead of '; ' for assembler new line character in the macro

For some assemblers, they use another character as newline in a macro
(e.g. arc uses '`'), so for generic assembly code, need use ASM_NL (a
macro) instead of ';' for it.

Basically this is the same patch as applied to Linux kernel -
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/include/linux/linkage.h?id=9df62f054406992ce41ec4558fca6a0fa56fffeb



but modified a bit to fit in U-Boot.

Signed-off-by: Chen Gang <gang.chen.5i5j@gmail.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>
Cc: Masahiro Yamada <yamada.m@jp.panasonic.com>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@ti.com>

arch/arc/include/asm/linkage.h

+/*
+ * Copyright (C) 2004, 2007-2010, 2011-2015 Synopsys, Inc. All rights reserved.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __ASM_ARC_LINKAGE_H
+#define __ASM_ARC_LINKAGE_H
+
+#define ASM_NL		 `	/* use '`' to mark new line in macro */
+
+#endif /* __ASM_ARC_LINKAGE_H */

include/linux/linkage.h

@@ -11,6 +11,11 @@
 
 #include <asm/linkage.h>
 
+/* Some toolchains use other characters (e.g. '`') to mark new line in macro */
+#ifndef ASM_NL
+#define ASM_NL		 ;
+#endif
+
 #ifdef __cplusplus
 #define CPP_ASMLINKAGE		extern "C"
 #else
@@ -43,15 +48,15 @@
 #define ALIGN_STR		__ALIGN_STR
 
 #define LENTRY(name) \
-	ALIGN; \
+	ALIGN ASM_NL \
 	SYMBOL_NAME_LABEL(name)
 
 #define ENTRY(name) \
-	.globl SYMBOL_NAME(name); \
+	.globl SYMBOL_NAME(name) ASM_NL \
 	LENTRY(name)
 
 #define WEAK(name) \
-	.weak SYMBOL_NAME(name); \
+	.weak SYMBOL_NAME(name) ASM_NL \
 	LENTRY(name)
 
 #ifndef END
@@ -61,7 +66,7 @@
 
 #ifndef ENDPROC
 #define ENDPROC(name) \
-	.type name STT_FUNC; \
+	.type name STT_FUNC ASM_NL \
 	END(name)
 #endif