debug_uart: Remove use of asmlinkage

This does not actually help any current arch. For x86 it makes it harder
to call (requires stack) and for ARM it has no effect. Drop it.

Signed-off-by: Simon Glass <sjg@chromium.org>

include/debug_uart.h

@@ -10,8 +10,6 @@
 #ifndef _DEBUG_UART_H
 #define _DEBUG_UART_H
 
-#include <linux/linkage.h>
-
 /*
  * The debug UART is intended for use very early in U-Boot to debug problems
  * when an ICE or other debug mechanism is not available.
@@ -64,46 +62,46 @@ void debug_uart_init(void);
  *
  * @ch:		Character to output
  */
-asmlinkage void printch(int ch);
+void printch(int ch);
 
 /**
  * printascii() - Output an ASCII string to the debug UART
  *
  * @str:	String to output
  */
-asmlinkage void printascii(const char *str);
+void printascii(const char *str);
 
 /**
  * printhex2() - Output a 2-digit hex value
  *
  * @value:	Value to output
  */
-asmlinkage void printhex2(uint value);
+void printhex2(uint value);
 
 /**
  * printhex4() - Output a 4-digit hex value
  *
  * @value:	Value to output
  */
-asmlinkage void printhex4(uint value);
+void printhex4(uint value);
 
 /**
  * printhex8() - Output a 8-digit hex value
  *
  * @value:	Value to output
  */
-asmlinkage void printhex8(uint value);
+void printhex8(uint value);
 
 /*
  * Now define some functions - this should be inserted into the serial driver
  */
 #define DEBUG_UART_FUNCS \
-	asmlinkage void printch(int ch) \
+	void printch(int ch) \
 	{ \
 		_debug_uart_putc(ch); \
 	} \
 \
-	asmlinkage void printascii(const char *str) \
+	void printascii(const char *str) \
 	{ \
 		while (*str) \
 			_debug_uart_putc(*str++); \
@@ -121,17 +119,17 @@ asmlinkage void printhex8(uint value);
 			printhex1(value >> (4 * digits)); \
 	} \
 \
-	asmlinkage void printhex2(uint value) \
+	void printhex2(uint value) \
 	{ \
 		printhex(value, 2); \
 	} \
 \
-	asmlinkage void printhex4(uint value) \
+	void printhex4(uint value) \
 	{ \
 		printhex(value, 4); \
 	} \
 \
-	asmlinkage void printhex8(uint value) \
+	void printhex8(uint value) \
 	{ \
 		printhex(value, 8); \
 	}