include/linux/printk.h: remove double asmlinkage in printk_emit

The double asmlinkage was introduced in commit 7ff9554b ("printk:
convert byte-buffer to variable-length record buffer").
Signed-off-by: Simon Kagstrom <simon.kagstrom@netinsight.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/linux/printk.h

@@ -120,7 +120,7 @@ asmlinkage __printf(1, 0)
 int vprintk(const char *fmt, va_list args);
 
 asmlinkage __printf(5, 6) __cold
-asmlinkage int printk_emit(int facility, int level,
+int printk_emit(int facility, int level,
 		const char *dict, size_t dictlen,
 		const char *fmt, ...);