env: cosmetic: drop assignment i = iomux_doenv()

iomux_doenv() can only return 0 or 1.
So there is no need to save its return value in variable i, as checking
its truth value within an if statement is enough.

Signed-off-by: Gerlando Falauto <gerlando.falauto@keymile.com>
Reviewed-by: Marek Vasut <marex@denx.de>
diff --git a/common/cmd_nvedit.c b/common/cmd_nvedit.c
index 0f320cc..eef6c10 100644
--- a/common/cmd_nvedit.c
+++ b/common/cmd_nvedit.c
@@ -239,9 +239,8 @@
 		}
 
 #ifdef CONFIG_CONSOLE_MUX
-		i = iomux_doenv(console, argv[2]);
-		if (i)
-			return i;
+		if (iomux_doenv(console, argv[2]))
+			return 1;
 #else
 		/* Try assigning specified device */
 		if (console_assign(console, argv[2]) < 0)