linux/kernel.h: fix kernel-doc warning

Fix kernel-doc warning in <linux/kernel.h>:

  Warning(include/linux/kernel.h:590): No description found for parameter 'ip'

scripts/kernel-doc cannot handle macros, functions, or function
prototypes between the function or macro that is being documented and
its definition, so move these prototypes above the function that is
being documented.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/linux/kernel.h

@@ -562,6 +562,9 @@ int __trace_bprintk(unsigned long ip, const char *fmt, ...);
 extern __printf(2, 3)
 int __trace_printk(unsigned long ip, const char *fmt, ...);
 
+extern int __trace_bputs(unsigned long ip, const char *str);
+extern int __trace_puts(unsigned long ip, const char *str, int size);
+
 /**
  * trace_puts - write a string into the ftrace buffer
  * @str: the string to record
@@ -587,8 +590,6 @@ int __trace_printk(unsigned long ip, const char *fmt, ...);
  *  (1 when __trace_bputs is used, strlen(str) when __trace_puts is used)
  */
 
-extern int __trace_bputs(unsigned long ip, const char *str);
-extern int __trace_puts(unsigned long ip, const char *str, int size);
 #define trace_puts(str) ({						\
 	static const char *trace_printk_fmt				\
 		__attribute__((section("__trace_printk_fmt"))) =	\