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>
diff --git a/include/asm-arm/u-boot-arm.h b/include/asm-arm/u-boot-arm.h
index 41e7a8f..4ee5a32 100644
--- a/include/asm-arm/u-boot-arm.h
+++ b/include/asm-arm/u-boot-arm.h
@@ -52,7 +52,7 @@
 /* To be fixed!							*/
 /* ------------------------------------------------------------ */
 /* common/cmd_nvedit.c */
-void	setenv		(char *, char *);
+int	setenv		(char *, char *);
 
 /* cpu/.../interrupt.c */
 void	reset_timer_masked	(void);