Make setenv() return status

Currently, the setenv function does not return an error code.
This patch allows to test for errors.

Signed-off-by: Steve Falco <sfalco@harris.com>

common/cmd_nvedit.c

@@ -380,13 +380,13 @@ int _do_setenv (int flag, int argc, char *argv[])
 	return 0;
 }
 
-void setenv (char *varname, char *varvalue)
+int setenv (char *varname, char *varvalue)
 {
 	char *argv[4] = { "setenv", varname, varvalue, NULL };
 	if (varvalue == NULL)
-		_do_setenv (0, 2, argv);
+		return _do_setenv (0, 2, argv);
 	else
-		_do_setenv (0, 3, argv);
+		return _do_setenv (0, 3, argv);
 }
 
 #ifdef CONFIG_HAS_UID

include/asm-arm/u-boot-arm.h

@@ -52,7 +52,7 @@ void	setup_revision_tag (struct tag **params);
 /* To be fixed!							*/
 /* ------------------------------------------------------------ */
 /* common/cmd_nvedit.c */
-void	setenv		(char *, char *);
+int	setenv		(char *, char *);
 
 /* cpu/.../interrupt.c */
 void	reset_timer_masked	(void);

include/common.h

@@ -243,9 +243,9 @@ char	*getenv	     (char *);
 int	getenv_r     (char *name, char *buf, unsigned len);
 int	saveenv	     (void);
 #ifdef CONFIG_PPC		/* ARM version to be fixed! */
-void inline setenv   (char *, char *);
+int inline setenv   (char *, char *);
 #else
-void	setenv	     (char *, char *);
+int	setenv	     (char *, char *);
 #ifdef CONFIG_HAS_UID
 void	forceenv     (char *, char *);
 #endif

include/exports.h

@@ -22,7 +22,7 @@ void vprintf(const char *, va_list);
 void do_reset (void);
 unsigned long simple_strtoul(const char *cp,char **endp,unsigned int base);
 char *getenv (char *name);
-void setenv (char *varname, char *varvalue);
+int setenv (char *varname, char *varvalue);
 long simple_strtol(const char *cp,char **endp,unsigned int base);
 int strcmp(const char * cs,const char * ct);
 #ifdef CONFIG_HAS_UID