stdio: constify "name" arg in public api

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/include/common.h b/include/common.h
index 189ad81..0d1c872 100644
--- a/include/common.h
+++ b/include/common.h
@@ -655,7 +655,7 @@
 /* common/console.c */
 int	console_init_f(void);	/* Before relocation; uses the serial  stuff	*/
 int	console_init_r(void);	/* After  relocation; uses the console stuff	*/
-int	console_assign (int file, char *devname);	/* Assign the console	*/
+int	console_assign(int file, const char *devname);	/* Assign the console	*/
 int	ctrlc (void);
 int	had_ctrlc (void);	/* have we had a Control-C since last clear? */
 void	clear_ctrlc (void);	/* clear the Control-C condition */