drivers/sbus/char/envctrl.c: ignore orderly_poweroff return value

orderly_poweroff() unconditionally returns 0, so remove the dead code that
checks the return value.

A future patch will change the return type to void.

Signed-off-by: Joel Stanley <[e-mail]>
Acked-by: David S. Miller <[e-mail]>
Cc: Fabian Frederick <[e-mail]>
Cc: Benjamin Herrenschmidt <[e-mail]>
Cc: Michael Ellerman <[e-mail]>
Cc: Rusty Russell <[e-mail]>
Cc: Jeremy Kerr <[e-mail]>
Signed-off-by: Andrew Morton <[e-mail]>
Signed-off-by: Linus Torvalds <[e-mail]>

drivers/sbus/char/bbc_envctrl.c

···
 	printk(KERN_CRIT "kenvctrld: Shutting down the system now.\n");
 
 	shutting_down = 1;
-	if (orderly_poweroff(true) < 0)
-		printk(KERN_CRIT "envctrl: shutdown execution failed\n");
+	orderly_poweroff(true);
 }
 
 #define WARN_INTERVAL	(30 * HZ)

drivers/sbus/char/envctrl.c

···
 static void envctrl_do_shutdown(void)
 {
 	static int inprog = 0;
-	int ret;
 
 	if (inprog != 0)
 		return;
 
 	inprog = 1;
 	printk(KERN_CRIT "kenvctrld: WARNING: Shutting down the system now.\n");
-	ret = orderly_poweroff(true);
-	if (ret < 0) {
-		printk(KERN_CRIT "kenvctrld: WARNING: system shutdown failed!\n"); 
-		inprog = 0;  /* unlikely to succeed, but we could try again */
-	}
+	orderly_poweroff(true);
 }
 
 static struct task_struct *kenvctrld_task;